What else do I need?

The BookyAI app with your BookyAI license activated, and the Sudoku studio license. The puzzles are made on your computer, without any AI and without an internet connection (during the 14-day guarantee, exporting a new book needs a connection; see the Export section). An AI engine (the one you already write books with) is only needed for two optional helpers: "Write the title, subtitle, welcome and section names", and "Suggest" for Wordoku words.