🉑 Vincent Leeuw It's a book by J.J. Abrams and Doug Dorst. Within the slipcase you'll find a book called "Ship of Theseus" that looks like it's from the '50s. That book is a story about a character with amnesia. The interesting part comes from the two people reading the book and communicating with each other by writing in its margins. From time to time you'll also find postcards, photos and notes tucked between the pages. It's a bit similar in feel to House of Leaves, yet takes the idea to a whole new level.