Hot off the press:
Ludotronics: A Comprehensive Game Design Methodology From First Ideas to Spectacular Pitches and Proposals
It’s a conceptually complete paradigm and design methodology for intermediate and advanced game designers, from coming up with a raw idea for a game to greenlighting a refined version of that idea for development.
Enjoy!
Note: For three years, from March 2019 through April 2022, a high-quality e-book version of Ludotronics was on sale at DrivethruRPG. After this date, I pulled this edition from sale, as it will be succeeded by a print edition scheduled for 2023.