Some crime fiction authors keep their work fresh and their creativity flowing by writing more than one series, sometimes concurrently. Multiple series can be good for readers, too, as they get to meet more characters and enjoy the change of pace that multiple series can bring. Authors who create more than one series have a few options. One is to have the main characters of those series interact and even work together, sometimes even combining the series. Another is to have those series remain totally distinct.
For example, Agatha Christie created three well-known series. There are 33 Hercule Poirot novels, 12 Miss Marple novels and four novels featuring Tommy and Tuppence Beresford. The characters are contemporaries, too. And yet, Christie didn’t write a novel in which Poirot and Miss Marple work together on a case or a novel in which Miss Marple meets up with the Beresfords although she could easily have arranged such a thing in terms of plots. Some of Christie’s “regular,” but more minor characters, such as her mystery novelist sleuth Ariadne Oliver appear in novels outside a given series. But we don’t see those series really intersect. In fact, we don’t even see it when it would be natural. For instance, in The Mystery of the Blue Train, we meet Katherine Grey, a paid companion who inherits a fortune when her employer passes on. She decides to use some of her money to travel and ends up getting mixed up in a case of theft and murder while she’s on the famous Blue Train to Nice. Hercule Poirot is on the same train, and it’s he who investigates this case. But what’s interesting is that Katherine Grey lives in the village of St. Mary Mead which, as Christie fans know, is the home of Miss Marple. Miss Marple isn’t mentioned in The Mystery of the Blue Train at all. Of course, one reason for this could be timing. The Mystery of the Blue Train was published in 1928; Miss Marple didn’t make her debut until 1930’s The Murder at the Vicarage. Still it’s interesting that none of Christie’s major sleuths work together on cases.
Ann Cleeves’ Shetland Quartet series features police detective Jimmy Perez. Each of those novels takes place in one or another place on the Shetland Islands, Perez’ “home turf.” Cleeves also writes the Vera Stanhope series, which features DCI Stanhope, who lives and works in Yorkshire. Each of those series has a strong sense of location and atmosphere, so in that sense, the series are quite distinct. And yet, Perez and Stanhope are contemporaries. It’s quite possible for an author with Cleeves’ talent to create a believable scenario in which the two detectives could interact. Thus far she hasn’t chosen to do that. Her most recent Vera Stanhope novel, The Glass Room, has Stanhope investigating a murder that takes place at a writer’s retreat. When Jack Devanney, one of Stanhope’s hippie neighbours, asks her to find his missing girlfriend Joanna Tobin, Stanhope agrees and traces the woman to the writer’s retreat. When she gets there though, she walks almost directly into a murder scene. Professor Tony Ferdinand has been stabbed and Joanna is found holding the murder weapon. Stanhope doesn’t want to believe Joanna Tobin committed murder, so she investigates to find out what lies behind this seemingly all-too-straightforward case. In Blue Lightning, the last of the Shetland Quartet (although I’ve heard another Jimmy Perez novel is in the works), Perez brings his fiancée Fran Hunter to his home at Fair Isle to introduce her to his family. As though the awkwardness of “meeting the family” weren’t enough, the body of a local resident, Angela Moore, is found at the Fair Isle bird observatory. Perez begins the investigation only to be cut off from outside help when autumn storms roll in and make travel to and from the island impossible. It’ll be interesting to see whether Cleeves considers having her protagonists work together or prefers to keep the two working in separate series.
Sometimes authors don’t have their protagonists interact because their multiple series take place during different eras. That’s the case with Kerry Greenwood. Beginning with Cocaine Blues, her first series takes place during the late 1920’s and features Phryne Fisher, a jet-setter who tires of life in London and decides to return to her home in Melbourne. She soon gets swept up in life as a lady detective, and in this series readers experience liberal, racy and sometimes very dangerous 1920’s Melbourne. Greenwood’s other series begins with Earthly Delights and features Corinna Chapman, who lives and works in modern-day Melbourne. Chapman is a former accountant-turned baker who at first isn’t nearly as enthused at being a detective as Fisher is, but she brings her own skills to the task.
There are other reasons, too, for which authors’ multiple protagonists might not interact. For example, some authors publish different series through different publishers. Others have other reasons. There are authors though who have chosen to bring multiple protagonists together. One of those authors is Robert B. Parker. His Jesse Stone series begins with Night Passage, in which Stone moves from Los Angeles, where he’s drunk himself out of his job as an L.A.P.D. detective, to Paradise, Massachusetts. Stone is hired there as Chief of Police because the town’s leaders think they’ll have an easy time manipulating him and that he’ll “rubber stamp” whatever they do. To put it simply, they are proven wrong. Another of Parker’s series features Boston private investigator Sunny Randall. When we meet Randall in Family Honor, she is hired by wealthy Brock Patton to find his missing fifteen-year old daughter Millicent. When she finds that Millicent has turned to prostitution, Randall discovers that there’s more to this case than simply returning a runaway teen to her home. She also finds that Millicent is in more trouble than it seems on the surface. These two sleuths meet in Blue Screen, in which somewhat sleazy film-maker Buddy Bollen hires Randall to protect his girlfriend rising star Erin Flint while they’re filming Flint’s newest movie. When Erin’s sister Misty Taylor is killed, Randall works with Stone to find out who murdered Taylor and why. Thereafter Randall and Stone, who each have plenty of personal issues, develop a relationship that continues on and off throughout several novels.
And then there are Michael Connelly’s sleuths, half-brothers Harry Bosch and Mickey Haller. Bosch is a member of the L.A.P.D. (most of the time in the series). Haller is a defense attorney. The Bosch novels begin with The Black Echo in which he solves the murder of an old friend and fellow “tunnel rat” from the Vietnam War Billy Meadows. In the first Mickey Haller novel The Lincoln Lawyer, Haller takes the case of Los Angeles playboy and real-estate dealer Louis Roulet, who’s been arrested for rape and murder. The case looks clear-cut but as Haller looks into it more deeply it becomes clearer that Roulet may be unlikeable, but that doesn’t necessarily mean he’s a murderer. These two sleuths meet and work together for the first time in The Brass Verdict. In that novel, Haller takes over some cases when a colleague Jerry Vincent is murdered. When one of them proves to be closely related to Vincent’s murder, he and Bosch work to find out who and what is behind both cases.
There are good reasons for an author to keep protagonists from different series separated, but often very good reasons to have them join forces, too. Do you have a preference? If you’re an author of multiple series, do you have your protagonists work together? Why (not)?
*NOTE: The title of this post is a line from The Beatles’ Come Together.













I do like the concept of bringing detectives together but there are reasons I like them to be separate. For instance, if Marple and Poirot got together, who would solve the case? Both are known for their brilliance and so who would get the credit in solving the case? They would have to solve it together but then that would be unrealistic. So sometimes, I like it when the keep things separate.
Clarissa – Now, that’s a very well-taken point. A mystery in which Poirot and Miss Marple worked together to solve a case would really not show either to the best advantage and it would be difficult to pull off in terms of characterisation. Perhaps that’s why Christie didn’t attempt it, at least not to my knowledge.
Margot: I have not found Harry and Mickey work well together. To begin with it seemed contrived to have them half brothers. It is one of the few times I thought Connelly has invented a plot line. I feel the two characters are too different and too independent to fit effectively together in books.
Laurie R. King, in The Art of Detection, had a clever means of uniting her characters 75 years apart in history by including a Sherlock Holmes story in the investigation of a contemporary murder of a Sherlockian by SFPD detective, Kate Martinelli. Unlike the mix of Harry and Mickey I felt the combination of Sherlock and Kate worked well.
I love *reading* it. Reminds me of the old superhero comics where the different superheroes joined forces. I know my editors wouldn’t like it, though! And my series are with two different imprints of the same publisher, so not sure how that would work.
Elizabeth – I was hoping you would comment, because you’ve got some great protagonists whom I could see logically meeting up. But as you say, with different imprints, that might be difficult to arrange. And it is risky to do, so I can see how your editors might not like it. But maybe someday Beatrice Coleman or Myrtle Clover will take a trip to Graceland
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Bill – You’re quite right that Harry Bosch and Mickey Haller are both very different as characters and very independent as people. Although I too prefer them separately, I don’t mind them as a team.
And thanks for reminding me of The Art of Detection. That’s a very clever example of two sleuths working together even separated by time. King took a risk with that novel, but it does work well.
For some reason I have always thought Miss Marple and M Poirot would not like each other if they did meet…though I’m not sure what I’m basing that on. So funny how we think we know these fictional people so well
Bernadette – Interesting point! To me that’s just a mark of Christie’s talent that we feel we really know those characters. Other authors can do that, too. You’ve made me think of an interesting question, too, for which thanks: Would Poirot and Miss Marple get on? Maybe not. They are very different people. I shall have to think about that one…
Poirot and Marple would make excellent neighbours but not as two sleuths working on a case together. I’d rather have Poirot and Holmes team up – think of the immense possibilities. Perhaps, we could have Marple and Watson lending a hand though I doubt the gentle sleuth from St. Mary Mead will play second fiddle to her Belgian counterpart.
Prashant – I very much doubt myself whether Miss Marple would be willing to let Poirot take the lead. She may be mild-mannered but she does have a strong will. And it would be fascinating to see what Holmes and Poirot would make of each other. That’s a really interesting question!
What an interesting idea, Margot! I think Hercule takes up so much oxygen there’s very little for anyone else. Most sleuths want to have the leading role – not sure how they’d feel having to share the spotlight.
Elspeth – LOL! You have a very witty way of putting that! And you make a solid underlying point. Most sleuths do want things to be done their way. There so many examples from crime fiction where partnered sleuths disagree on what to do. One does wonder how those sleuths such as Poirot and Holmes, who don’t usually have a co-lead, would react. How many could share top billing?
I like it when series intersect. Michael Connelly has done it with other of his characters, too. So has Robert Crais, whose main character in Demolition Angel appears in a few Elvis/Joe books. Crais and Connelly even did this to each other – Elvis appears briefly in a Harry book and vice versa, though annoyingly I have forgotten which.
It needs to be done subtly so that regular readers appreciate it but new readers are not excluded. Harlen Coben does it quite well with various people such as lawyer Hester Krimenstiein, and Little Pochahontas and Lori ? (the special investigator) apprearing in various Myron Bolitar and “standalone” novels.
Recently, there was a nice paragraph or two in Nights of Awe featuring a character from the author’s Helsinki Homicide series. This would not have been obvious if you hadn’t read any Helsinki Homicide books, but was a nice “nod” to those who had, which is as it should be (?!).
Maxine – Now you’ve got me thinking, for which thanks
. I’ll have to dig in and try to recall in which Elvis Cole and Harry Bosch interact. It’s niggling at the back of my mind, so time for some retrieval!
You make a well-taken point too that such intersection needs to be done both subtly and deftly. It’s an effective way to “nod” to regular readers without mking new readers feel like “outsiders.” Your example of Harlan Coben is a terrific one too. And folks, Maxine is right. Try the Helskini Homicide series.
A-ha! I remembered, Maxine! Thank you for making my creaky old brain function! Elvis Cole appears in Michael Connelly’s Lost Light. Bosch appears in Robert Crais’ The Last Detective.
Brilliant, Margot! I’ll go and look it up now.
I think it would be fun to spin off secondary characters into their own series, which would allow the characters to connect in both. What about using P.I. Patsy Strump from The Desert Hedge Murders in her own series? Or The Florida Flippers?
Pat – Oh, now, I’d like to see Katrina and the Florida Flippers in their own series. Oh, how cool! The senior Grisseljons would be interesting, too. Now you’re getting me all interested in seeing where you take your Silvia and Willie stories if you decide to add to them.
The only author I can think of with more than one series which I follow is Michael Connelly. I like both the Harry Bosch and the Mickey Haller series, when each character acts separately and when they work together, although I think the duo works better in some books than others.
Of Kerry Greenwood’s books, I prefer Corinna Chapman’s adventures over Phrynne Fisher’s and a friend is an avid Fisher fan and not one of Chapman’s. I will try again though.
I can’t see Hercule Poirot or Sherlock Holmes collaborating too well together. Poirot has way too large an ego and Holmes does also, but he is collaborating with Dr. Watson, who plays second-fiddle and doesn’t try to outshine the detective.
Arnaldur Indridason seems be able to have different characters shine within the same series. If he did write a series with Elinborg, for instance, I think it would do well. She’s not as introspective and moody as the Erlendur we know and love, but she is good at her job and her family life is realistic and normal.
Kathy – I think it’s so very interesting that the same author can write two series that are different enough so that readers like one better than the other. Each author has a distinctive voice that I think comes through in any series s/he writes. So I often wonder what it is about those series that leads us to prefer one over the other.
You’ve a well-taken point that Holmes and Poirot both have very large egos and a sense of arrogance about their ability to solve crimes. That could definitely get in the way of their collaborating. Solid point, too about Arnaldur Indriðason’s series. Different characters take the lead in those novels, and I wonder whether he would write a “spinoff” series that just featured Elinborg, for instance.
Why do many people solely accuse Hercule Poirot of being egotistical or arrogant, when Sherlock Holmes can be just as bad?
Lady Lavinia – That’s a very interesting question, actually. One possible answer is that he is often described as conceited in the Agatha Christie books that feature him, even by his close friend Arthur Hastings. While Watson often comments on Holmes’ strange behaviour and so on, he doesn’t spend a lot of time describing Holmes’ arrogance. I’m not sure if that’s true, but it’s at least a possibility.