This western book is called “Library Lion” in English and has been a bestseller in the United States.
In Japanese, it is called “Toshokan Raion.” (Library Lion)
Did I like this book? Well, I didn’t hate it, but I didn’t love it either. Nothing much happens. A lion goes into a library and helps out. That’s about it. I suppose the humor lies in the fact that it is a lion and you expect it to eat people, but it does the exact opposite. Anyway…I found this book a little boring.
The English version is here.
The Japanese version is here.