Nobody even mentioned novellas, novelettes or any of the other hybrid mutants. Nobody even agrees on word counts for any of them. Rex Stout used to publish three novellas and a short story together as a hardcover book, most of them starring Nero Wolfe and Archie Goodwin, but that's about the only consistent example I can name. Granted, the average mystery was much shorter than it is today, and Stout died in 1975. His novellas were probably between 15 and 20 thousand words, and you'll see where I came up with that estimate in a minute. Now, authors occasionally publish an eBook novella between longer works to keep readers aware of them.
A writer friend told me he had trouble keeping the large cast of characters straight because they all showed up early in the story. I tried cutting some of them--and the story's overall length--and created an incoherent mess. I didn't see enough potential subplots to make the story into a novel, so it languished for four years.
Then someone told me about the Black Orchid Novella Award, sponsored by the Wolfe Pack (The Rex Stout Appreciation Society, named after his detective, Nero Wolfe) and Alfred Hitchcock Mystery Magazine. The contest wanted stories between 15K and 20K words (see above) and following the general form of Stout's mysteries. Well, I'd read most of Stout's work because he was one of my mystery-reading mother's favorites. Archie's tone was a big influence on my own writing, maybe because we're both from the Midwest.
Could I add words to "Stranglehold" and turn it into a novella? If I expanded the opening, that large cast would appear more gradually and be easier to absorb. Imagine my surprise when I added 9000 words--and only two minor transition scenes--to the story in four days. I had a novella on my hands without even knowing it. I sent it off to the contest, and it won. It appeared in Alfred Hitchcock Mystery Magazine in summer 2010.
OK, I thought. When you have more detail than you can pack into a short story, think novella. I've never done that again.
Five years later, I struggled with another Woody Guthrie novel. By now I knew his name because he'd appeared in two novels, and so had several of his supporting cast. This time, I had the opposite problem from "Stranglehold." I had a solid main plot and an anemic subplot I couldn't expand without excessive and obvious padding.
My wife suggested that maybe it would work as another novella, and she was right. "Look What They've Done to my Song, Mom" won the award in 2015 and appeared in Alfred the following summer.
Now, I think I know how to write a novella. Step one is don't plan to do it. If you find yourself trapped with no other way out, focus on one main plot and one subplot. You might have a second subplot if it resolves easily. We're talking 60 to 80 pages, so we don't have a lot of introspection, static lyrical description, or technical wherewithall. If two sets of somewhat similar characters work through parallel or related plots, they're easy to bring together at the end. In both novellas I've written so far, each plot involved members of a band and their music.
Both stories have about ten characters, too. The band was a quintet in the first one, and four of the members were suspects in the killing of the fifth (Music fans would call this the "diminished fifth"). In the second story, the remaining members all have something at stake and two of them are suspects again. If you're a musician, you might think long and hard before joining this band.
I'm kicking around ideas for another novella. It doesn't involve Woody or the band or music, but I have about ten characters again. And one subplot.
If it works out, maybe I'll show it to you.
If it doesn't, maybe I really have a bloated short story on my hands...or another anorexic novel.
TIME FOR THE BSP: My sixth Zach Barnes novel, Back Door Man, a light-hearted romp into a cold case involving mass murder, is now available, just in time for your Christmas shopping.
If I'd known it would be ready for the holidays, maybe I would have called it "Violent Night."