This book contains two of the most famous novels by Edogawa Rampo: the Black Lizard and the Boy Detectives Club. I enjoyed both, but I found the Boy Detectives Club to be more engrossing and exciting, even though it is written for children.
Book review: 『大金塊｜怪人二十面相』by Edogawa Rampo
This book contains two short novels from the Boy Detectives Club series. Even though they are books for children, they were very pleasant to read!