DigiCube Guide Book (DigiCube) - Character Card Books (DigiCube) - Daizen (Famitsu) - Kōshiki Kōryakuhon (V Jump) - The Official Strategy Guide (Prima)
WotL books
Official Complete Guide (Square Enix) - Perfect Guide (Famitsu) - Tactics for Beginners (V Jump) - Official Strategy Guide (BradyGames)