American Mermaid by Julia Langbein

A brilliantly funny debut novel that follows a writer lured to Los Angeles to adapt her feminist mermaid novel into a big-budget action film, who believes her heroine has come to life to take revenge for Hollywood's violations.
"Brilliantly sharp, funny, and thought-provoking, the gripping story of a woman trying to find her way in our chaotic world." —Madeline Miller, bestselling author of Circe
Broke English teacher Penelope Schleeman is as surprised as anyone when her feminist novel American Mermaid becomes a best-seller.  Lured by the promise of a big payday, she quits teaching and moves to L.A. to turn the novel into an action flick with the help of some studio hacks. But as she's pressured to change her main character from a fierce, androgynous eco-warrior to a teen sex object in a clamshell bra, strange things start to happen. Threats appear in the screenplay; siren calls lure Penelope's co-writers into...