The greatest books that never were

Literature is full of imaginary books. Given the choice, which one would you read?
Imaginary books seem to be nearly as numerous as the real ones, and that’s even when you don’t count all those bestselling thrillers people believe they’ll write someday if only they can find the time to write the damn thing down. Nonexistent books certainly have some devoted fans, such as the proprietor of the ever-diverting Beachcomber’s Bizarre History Blog, who is making bold moves to expand the collection known as the Invisible Library.