I've been writing a series of space opera novelettes featuring the main characters from my 2008 novel, Template, plus Erm Kaslo, hero of A Wizard's Henchman (2017). My original plan was to sell them to magazines as individual stories, and I'd even sold the first, "Stopover at Meech's World," to Amazing Stories. Eventually, I'd fix them up into an episodic novel.
But then I had such a good time with Pete and Nicky Crowther of PS Publishing at WorldCon. They'd previously published four chapbook novellas about my corpulent master criminal of the far future, Luff Imbry, and their current release of the four as a paperback omnibus, Forays of a Fat Man, reminded me how much fun it was to work with them.
So I've put the first four novelettes together as 39,000 words, called it Passengers & Perils, and sent it off to PS. We'll see what happens.