Tiny Magic 8-ball. Pocket-sized! Convenient! Use it to make regretful life decisions on the go! Click here to see that it is indeed fully functional.
To be fair, this isn't really all that miniature, though it is smaller than a typical book, so I'm counting it here. With 6 poems "The Raven", "To Helen", "The City in The Sea", "A Dream Within A Dream", "The Conqueror Worm", "the Bells", 4 complete short stories ("The Black Cat", "The Masque of the Red Death", "The Tell-Tale Heart" and "The Cask of Amontillado") a short biography and some nice illustrations, it's not a bad little introduction to his work.
Take a peak inside.