Some fairly important mysteries have already made it to Gutenberg, but this is the first I've heard of R. Austin Freeman's The Red Thumb Mark. Part of the "Impossible Crime" Movement and featuring Dr.Thorndyke, this is a critical publication for those interested in the development of the mystery.
With this publication there were three other Thorndyke mysteries--The Uttermost Farthing, John Thorndyke's Cases, and The Mystery of 31 New Inn. I must confess ignorance as the the first and last of these--so more new good reading.
