Episode 8

Plot:
This 8th episode has quite the same theme as the previous. Biragon reads a super funny book and Kure Kure just cant stand it! He must have it! So he and Chonbo writes their own book with a cute cover, but inside it only says that Biragon is an idiot! When laughing at their book, Biragon of course becomes jealous so he wants to trade books. Now what was it that was so funny in Biragons book?