The Secrets of Pokemon is a small, 1998 booklet about Pokémon's early years in Japan. It was written by the "Pokémon Business Study Group", consisting of three people: Reiko Iwaki, Shinohara Shinji, and Yoko Oba. Notably, the book was published a few months before Pokémon's roll-out in North-America and the rest of Asia.
Table of contents
The book featured on this site is this one:
It was released on 1 June 1998 by Shogakukan, which also produces the anime.
Curiously, there appears to be another book with the same title, released a few months earlier:
As of 11 November 2023, this book is $283.93 on amazon.com, for whatever reason (in the past, it actually was $315 for a while, if not more). I'm not going to pay that much for a single book, especially when it turns out to be the same as the other one. If someone has this book and can clarify this issue, please leave me a note.
I can create a PDF document of the book if all pages have been proofread.
Similarly, I can create a PDF document of the book if all pages have been translated.