Mr. Mystery

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" series). Unlike Mr. Midnight, it has a fixed group of main characters. The series is published by Angsana Books, Flame Of The Forest Publishing. 36 books in the series, including 6 Special Edition titles, have been published.
Author.
James Lee is the author of the series.
Plot.
The story is about 6 (briefly 5) friends who run a detective company, named Soh & Co, in an old storeroom behind Alvin Soh's mother's jewelry shop. A large sign hangs outside proudly proclaiming:
 SOH & CO
 INVESTIGATORS
 We investigate anything
 No case too big or too small
They are frequently roped into solving crimes that baffle the police by their suspicious clients, frowned upon by their friend in the police, Sergeant Soo, as well as Alvin's mother, Gracie Soh.
Minor characters.
New characters are featured in each book as well.
Books.
The latest book in the Mr. Mystery series is Mr. Mystery #30, "The Mystery Of The Missing Motive".