This is my all-time favorite book. I feel like every book I read is instantly compared to this one (and nothing has even come close yet imo). 

Danielewski is truly incredible at twisting the definition of what a "novel" is or can be. The format is like nothing I've ever seen before, the typography is literally art, the story telling breaks dimensions, and the book physically forces you to read it in bizarre ways to mirror the strangeness of the plot itself. The experience of this book is absolutely worth every second.