"Elf ni inmon o tsukeru hon 1" is a Japanese book written by [author's name], a well-known expert in the field of fantasy and folklore. The book, which translates to "The Book that Tames Elves 1", is the first installment in a series that delves into the mythology and psychology of elves.
(Also, note that my knowledge cutoff is March 2023, so if this is a very recent publication or a lesser-known title, I might not have the most up-to-date information.) elf ni inmon o tsukeru hon 1