
Books have been released as tie-ins, including Xena Warrior Princess: Complete Illustrated Companion. There have also been a number of novelizations by authors like Martin H. Greenberg.
A book was also released in 1998, XENA: All I Need to Know I Learned From the Warrior Princess, allegedly written by Gabrielle, Bard of Poteidaia, and was "translated" by Josepha Sherman. It contains Gabrielle's viewpoint on many of the adventures she and Xena embarked on, and also includes eight pages of black-and-white photographs from the show. The book is basically Gabrielle talking about her view of the world on many different subjects. For example, in one of the chapters, "Anything can be a weapon- Anything!", she instructs the reader on fighting without traditional weapons, such as a sword or a staff, and in another, "Nobody likes a winer", she laments on the perils of alcohol.
It also launched the The Official Guide to the Xenaverse, by Robert Weisbrot, with photographs in color and black and white, a complete and detailed episode guide to the first two seasons, a look behind the scenes, the intriguing story of the origin of Xena: Warrior Princess, biographies of cast and crew and trivia about the show.
There are also some fictional books: The Empty Throne, The Huntress and The Sphinx, The Thief Of Hermes, and Prophecy of Darkness.
This section of the website is from Wikipedia, and is as recent as 7/1/09.