Square-Enix has created a special page for the Kigndom Hearts Dream Drop Distance Ultimania, which is the official guidebook from Square-Enix.

The Ulimania book will contain additional information such as characters, gameplay, secrets and hopefully the future towards the Kingdom Hearts series. This is like a Final Mix version, but not as a game. It's a book that's usually exclusive for fans across Japan. Kingdom Hearts Dream Drop Distance Ulitmania will release on May 1, 2012 for a price of ¥1,890 (approximately $22.88).