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Spoiler Alert.PNG Spoiler Alert: WARNING! This page happens to contain a lot of heavy spoilers that are all originated from the Overlord Light Novel series written by the author Kugane Maruyama. To every Anime-only watchers and Manga-only reader out there viewing this warning, please mindfully consider your decision first before choosing to expose yourself on reading the information below. If you're not currently up-to-date with the main source material in the official books, do consider staying away from the page for non-spoiler sake until you actually read it first ahead of time.

Living With Hamu-chan! An Encyclopedia For Raising Hamsters (かわいいハムちゃれと暮らそう!くムスタ〜の飼い方大石科〜) is a book found in Ashurbanipal.


A book on animal behaviors, specifically hamsters.


A medium-size book with a plain cover.


The book has detailed information on hamsters. According to the content, hamsters birth a litter between five to ten infants. However, it is not uncommon for the mother to experience stress and devour some of the babies if they come in contact with humans. In addition, it mentions that a hamster's gestation period to be two to three weeks with the potential to breed again almost immediately after a mother has given birth. 


  • A copy of this book was kept in Ashurbanipal, making Ainz believe that it originally belonged to a guild member that owned a hamster. He used it to help himself and Aura try to better understand the nature of Hamsuke and possibly her species.[1]