The Adventure of the Engineer's Thumb

From Author Wars - https://authorwars.com/books/the-adventure-of-the-engineers-thumb-3274581.html

Overview:

Title: The Adventure of the Engineer's Thumb
Author: Sir Arthur Conan Doyle
Year: 2013
Type: Short Fiction

Editions/Publications:

2013 . The Complete Sherlock Holmes (2013, Sir Arthur Conan Doyle, Race Point Publishing, ISBN-10: 9781610589734, digital audio download, Omnibus)
2013 . The Complete Sherlock Holmes (2013, Sir Arthur Conan Doyle, Brilliance Audio, digital audio download, Omnibus)