Mr. Mystery is a mystery-fiction book series written by Jim Aitchison under the pseudonym of James Lee (also the author of the Mr.

Midnight, it has a fixed group of main characters.

36 books in the series, including 6 Special Edition titles, have been published.

The story is about several friends who run a detective company, named Soh & onCo, in an old storeroom behind Alvin Soh's mother's jewelry shop.

No case too big or too small They are frequently roped into solving crimes that baffle the police by their suspicious clients, which is frowned upon by their friend in the police, Sergeant Soo, as well as Alvin's mother, Gracie Soh.