Atomic Blonde – Monte Steele (Playtime Book #639, 1963)
The narrator of Atomic Blonde is Johnny Stone, an insurance fraud investigator in Desert City, Nevada, who happens upon a platinum blonde bombshell with a flat tire and a pink Caddy. He offers to help fix the flat but she keeps telling him no but, being the ladies man and gentleman he is, with the possibility of getting some blonde pussy, Johnny doesn’t listen to her — and when he opens her trunk to get the jack, he finds the stuff dead body of a man and a diamond head rattlesnake.
The blonde takes off in his car.
Then two thugs try to kill him — they keep trying to kill him throughout the book, which takes place in 48 hours.
In that 48 hours, Johnny has sex with half a dozen women, from maids to whores to the blonde and his own girlfriend, Carol, who has no idea what a pussyhound he is — or does she? She does get him to marry her in the end.
Atomic Blonde is mindless entertainment but well-written, you can tell whoever is behind this pen name knows his stuff so I am going to assume it was/is a name writer. It falls into some genre cliches but now and then are gems of sentences scattered about the prolonged sex scenes and moments of hardboiled violence.