The Strongest King Encyclopedia Dragons, Characters, Dinosaurs, Yokai, Animals, Different Species A set of 6 books for about 8,000 yen. All without covers! There are a few scratches, but the contents of the books are clean and can still be used. There is also a membership card that came with the dragon book! Since these are books for a limited time, how about getting them all together at a great price? (^^)