The Red Paste Murders, by Arthur Gask (epub/Kindle)

The Case of the Murdered Mathematician, by Harry Stephen Keeler (epub/Kindle/pdf)

Quiribus Brown, probably the only 7-and-a-half-foot-tall mathematical detective in the Midwest, has

Walk Softly, Death, by Arthur Leo Zagat (epub/Kindle)

A jail cell held the answer to the murd

Forgotten Future, by Arthur K. Barnes (epub/Kindle/pdf)

No Escape from Destiny, by Arthur Leo Zagat (epub/Kindle)

It took a crackpot genius like Parker to appear in a room that he could not enter—and then prove he

A Collector of Ambroses, by Arthur Jean Cox (epub/Kindle/pdf)

Three unscrupulous book collectors encounter a true "Completist"...

The Matilda Hunter Murder (The Tuddleton Trotter Mysteries, Vol. 1), by Harry Stephen Keeler (epub/Kindle/pdf)

It all began with a mysterious black satchel stitched closed with silver wire. Mrs. Matilda Hunter,