#WritersCoffeeClub Do you set out to write a series of a certain number of books?
Yes, but it never quite works.
The Laundry Files was just this short one-shot novel (I'm now rewriting book 14 …)
The Merchant Princes started with a 4-book pitch: it ran to 9 books and book 4 of the OP ended up as the last three chapters of book 9.
I have a couple of 2-book trilogies too (book 3 never got written).
Economics overrules enthusiasm, after a certain point: success in the market buys sequels.