Decided against rereading If on a winter's night a traveler and picked up Cosmicomics by the same author. It's a collection of short stories (each about 15 or so pages) with the same narrator (who is a character as well), who is a being that has existed for a very very long time. Essentially Calvino takes a little scientific factoid, such as the proximity of the Moon to the Earth during its initial formation, and makes a story out of it. It's actually pretty cool.
If on a winter's night a traveler is, without spoiling too much, a book about you (much of the book is second person) trying to read If on a winter's night a traveler--and having lots of problems doing so. Every other chapter is the first chapter of various books you read, while the other chapters are you trying to find the various books that you've been reading. It's awesome.