Though "ultimate" is an overstatement, there is much to enjoy here. This book is nowhere near as comprehensive as Clute and Grant's Encyclopedia of Fantasy, but it does have its own virtues. It is lavishly and colorfully illustrated (note especially the stunningly beautiful full-page painting opposite Terry Pratchett's foreword). It has entries for most well-known fantasy authors of the past and present. There are sections on types of fantasy (fairy tales, animal fantasies, Arthuriana, humorous, heroic, etc.), movies, TV, fantasy characters and entities, games, and fantasy worlds (Middle-earth, Narnia, Discworld, Earthsea, etc.). This is an entertaining, informative and visually appealing book for anyone who enjoys fantasy.