The Dark Descent of Elizabeth Frankenstein

Review from Booklist Reviews:

Elizabeth Lavenza knows her place: she's the calming influence over Victor Frankenstein's violent moods, and if she stops being useful to the Frankensteins, she'll have nowhere to go. When Victor stops writing letters from university in Ingolstadt, Elizabeth, who's terrified of becoming unnecessary, sets out to track him down. What she finally discovers is gruesome, albeit awe-inspiring, but her instinct to protect him is impossible to fight. As Victor's actions become more deranged, however, Elizabeth can't bring herself to be a willing accomplice. In this clever retelling of Mary Shelley's Frankenstein, White neatly undercuts the original by making Victor's narrative wildly unreliable. Elizabeth, who's a minor character in Shelley's novel, takes center stage here, and her development is the emotional heart of the story. After enduring years of gaslighting by both Victor Frankenstein and his father, she gradually comes to realize her own strength and becomes powerful in her own right. While readers of the original might get more out of it, this character-driven novel with a healthy amount of gore should appeal to horror fans, too.