The Adventures of Tom Bombadil - J.R.R. Tolkien

Or as it is fully titled: "The Adventures of Tom Bombadil and other verses from The Red Book", an antology of short stories and poems, yet not all based around good old Tom.

Instead, we get an inside look at all kinds of short stories Tolkien wrote for his children and grandchildren, and how they get slowly fitted into Middle-Earth lore.

One of the most intriguing characters in the The Lord of the Rings, the amusing and enigmatic Tom Bombadil, also appears in verses said to have been written by Hobbits and perserved in the "Red Book" with stories of Bilbo and Frodo Baggins and their friends.  The Adventures of Tom Bombadil collects these and other poems, mainly concerned with legends and jests of the Shire at the end of the Third Age.

This special edition has been expanded for the first time to include earlier versions of some of Tolkien's poems, a fragment or a prose story with Tom Bombadil, and comprehensive notes by acclaimed Tolkien scholars Christina Scull and Wayne G. Hammond.

Ow, and Harry Potter fans, sorry, but in 1930 professor Tolkien already wrote about magic users called "Dumbledore"...