Magic is a prolific game and created the collectible card game craze that swept the nation. With so many cards out there, a collector would have a difficult time knowing exactly what cards he has left and their value in the game. That's why they created Magic The Gathering: The Official Encyclopedia. These books cover more than five volumes and include every card every produced by the Wizards of the Coast's Magic:The Gathering.
It is an essential tool for anyone that collects the cards either for playing the game or for the sheer love of card collecting. Many of the cards displayed are out of print and can only be found on auction sites like eBay. Their value to some is immeasurable and some people wouldn't even know they existed without the help of the encyclopedias.
The bad news is there books are all sold separately, so you're looking at about $20 per book. For anyone that collects the game with a passion, it is a small price to pay. These mammoth volumes will unlock the secrets for the very rarest cards, so they can be on the lookout. You can also use it as a quick reference rather than searching through your deck or card books.