Ragnarok Online Bible (Korean: 라그나로크 온라인 바이블) is a 600-page book divided into 8 chapters of everything one needs to know about Ragnarok Online. From the friendly and detailed explanation for the novice user to the profound contents for the advanced user, the contents are tailored to all users who enjoy Ragnarok, and the interview with RO development team which examines Ragnarok's past, present and future.