A review by crowfood
The Puppet Masters by Robert A. Heinlein

4.0

It is hard to find a half-decent female character in science fiction novels from the period in which this was written. You won't find any here.

The only real female character starts with a leg up. She is one of the top agents for the top-secret Section. Things go predictably downhill from there. She is also "super hot" and can spot the titular invaders because they're not attracted to her smokin' bod. She soon submits to the protagonist's ridiculous demand of marriage, and thereafter her dialogue more or less consists of "whatever you say, dear." Sigh.

That aside, the rest of the story is a classic that seems to have set the precedent for countless later imitations.