A new summary for Charmed: Let Gorgons be Gorgons has appeared online:
Hell hath no fury…
Newly awakened, the gorgon Medusa now roams the streets of San Francisco, taking her vengeance on the men who wrong her. Attacks on the questionably innocent men grow, and in a race to restore their innocents' lives, the Charmed Ones—Piper, Phoebe and Paige—and their magical sister, Prue, must defeat an enraged gorgon who has sisters of her own.
The novel releases September 18, 2018.