The Gigantic Robot
If you're looking for a good book that won't take a lot of time to read, but you'll want to hold onto for a while, consider The Gigantic Robot by Tom Gauld. The 32 page book details the trials and tribulations of a massive and impressive secret weapon whose promise consistently remains unfulfilled. Each page has only one sentence on the left and a stark, striking, black-and-white image on the right.
Boing Boing's Mark Frauenfelder reviewed the book, noting that "even though it took 60 seconds for me to read it, I went back and studied the powerful illustrations for a long time."