How do I create a book where every chapter is its own story, with its own title?

From version 1.9.20, on the first step of the New Book form, under "What is your book about?", choose "A collection" under "What kind of book?". Every chapter is then a complete story with its own title: short stories on a theme, true tales, case studies, a book in the spirit of The Darwin Awards. Three optional fields appear: what the stories are (invented, inspired by real events, or your own), what ties them together, and what every story shares (for example "each story ends with a one-line verdict"). On the Structure step the sliders become "Stories" and "Words per story", and the list "Your stories" appears. BookyAI then plans the stories, writes each one to stand on its own, and makes sure no two of them repeat the same names, places, twists or openings. "One continuous book", the default, works exactly as before.