Here’s the blurb:

Chloe has joined a volunteer beach preservation group, and her first day’s exhausting work is spent cleaning up a secluded stretch of beach. She doesn’t believe the local town’s made up mythology about a tribe of sentient Lizard People that lives nearby.

After staying out on the beach too long, night falls and she discovers that the Lizard People are very real. She also discovers that they have a mating season, and she’s right in the middle of it.