It's a tricky bank shot, sneaking a character's villainy (or madness) under cover of a seemingly-reasonable first-person narration. Props to Zeltserman for ambition, and for a pretty readable, grimy take on conventional noir tropes...
...even if through the whole book I kept remembering how much I liked Jim Thompson's
Pop. 1280.
Still, worth a look, and superior to Joe Lansdale's
The Leather Maiden,
which...