You got one vote for #35. It's a great photo and book cover. I see it features one of the knives from your collection and certainly not to distract from your book itself, but the photo brought to mind this classic upbeat ditty about a womanizing serial killer.
"Oh the shark babe has such teeth dear
And he shows them pearly white.
Just a jacknife has old MacHeath babe
And he keeps it out of sight.
Now on the sidewalk, sunny morning uh huh
Lies a body, just oozin' life
And someone's sneakin' round the corner
Could that someone be Mack The Knife?"
When something instantly pops into your head like that upon seeing a well-done photo, you know it's a good one! Plus, the implication of somebody using a common pocket knife to kill people is just kind of creepy.
Haven't read your book but tell your wife she did a great job on the photo!