I'm extremely surprised You're Stepping on My Cloak and Dagger by Roger Hall didn't make the list. This book had me in stitches the entire time reading it. Amazing story teller and just an overall amazing story.

Link: https://www.amazon.com/Youre-Stepping-Cloak-Dagger-Bluejacke...

It seems that this specific gun was owned by Roger Hall (OSS): https://www.youtube.com/watch?v=4tct21UpVwM