I'm not sure how to describe this book. It is fascinating. Imagine that you have stumbled upon a book called Ship of Theseus by VM Straka. And as you are paging through the book, you see that the margins are just FILLED with scribbled notes from two people. The two main characters are communicating via margin notes, both of them helping to unlock a mystery about the book''s author. It feels so genuine. The "ink" in the margins look real, there are postcards, a map drawn on a napkin, letters tucked into the pages. You really feel like you've stumbled upon someone else's mystery. A bit confusing in the sense of "do I read the book?" or "do I read the margins?" and I ended up doing a hybrid of the two. Definitely worth a look!