September 9, 2018 Puzzle Doctor

Challenge The Impossible: The Final Problems of Dr Sam Hawthorne by Edward D Hoch

November 10, 2017November 10, 2017 Puzzle Doctor

All But Impossible by Edward D Hoch

April 4, 2015March 11, 2016 Puzzle Doctor

Nothing Is Impossible: Further Problems of Dr Sam Hawthorne by Edward D Hoch

June 5, 2012June 5, 2012 Puzzle Doctor

Six Impossible Things – Dr Sam Hawthorne stories 28-33 – Edward D Hoch

March 5, 2011March 5, 2011 Puzzle Doctor

Mysteries for Younger Readers

January 22, 2011January 27, 2017 Puzzle Doctor

More Things Impossible: The Second Casebook of Dr Sam Hawthorne by Edward D Hoch

December 29, 2010April 3, 2016 Puzzle Doctor

Locked Room Mysteries

December 23, 2010July 22, 2020 Puzzle Doctor

Diagnosis: Impossible – The Problems of Dr Sam Hawthorne (2004) by Edward D Hoch