The book features interviews from just about, if not everyone who was ever involved with the character. it also includes some never before seen sketches, roughs, and script pages.
The softcover, 1st edition of the book is currently out of print. Portions of this version are available to read on Google Books. TwoMorrows is in the process of releasing a second, definitive edition of this guide in Hardcover, which was available for Preorder on Amazon, but appears to have been taken down (presumably due to the recent purchase of the character by Marvel, and TwoMorrows desire to include what Marvel will do with the character).