6 books in series

宝石商リチャード氏の謎鑑定

宝石商リチャード氏の謎鑑定 is a 6-book series with 6 released primary works first released in 2015 with contributions by Nanako Tsujimura.

The Case Files of Jeweler Richard (Light Novel), Vol. 1
The Case Files of Jeweler Richard (Light Novel), Vol. 2
The Case Files of Jeweler Richard (Light Novel), Vol. 3
The Case Files of Jeweler Richard (Light Novel), Vol. 4
The Case Files of Jeweler Richard (Light Novel), Vol. 5
The Case Files of Jeweler Richard (Light Novel), Vol. 7