How do I write a book series where the AI remembers the previous books?

Two ways to start. If you already have a book: open it and use the "Series" card on the right ("Start a series with this book") — it becomes Book 1. If you are starting from zero: in your Library click the "Start a series" tile (or "New Series" in the sidebar) and plan the saga first — name, premise, planned arc, writing style. Either way, when you create the next book of the series (the "+ Next book" tile on the series shelf, or "Write the next book" in the series workspace), the new volume is generated knowing: the shared characters and world of the series, a "previously in the series" recap of what actually happened in the earlier volumes, and any story threads those volumes left

unresolved. The wizard opens pre-filled with the series' genre, style, tone and author name, so every volume keeps the same voice.