Sorta! The short answer is that there's no solo play support in the book, but there is advice on journaling-as-play and writing fanfiction about the game. Because this is a TTRPG that's also designed to be engaged with as a book, "reading the game" and "imagining what the characters are doing" and "writing stories about the characters" is fundamentally solo play! So if you like to engage with TTRPGs on your own, there will be a lot here for you.