A devastating accident. An artificially intelligent prosthetic that makes her sleepwalk... A series of murders.

Lena hates her parents' tech company. The world worships each cutting-edge CyberCorp release, but Lena has her doubts. Machines that think for themselves? She doesn't trust them... So when a car accident lands her with the company's first cybernetic arm, she's pissed.

A glitch in the arm's artificial intelligence makes her sleepwalk. Meanwhile, children of CyberCorp employees start dying in their beds, and thanks to her unwanted nighttime strolls, Lena has no alibi.

Is she a target? A suspect? Lena literally can't sleep at night until she proves her innocence-or her guilt.

Marissa Meyer's Cinder meets Netflix's Black Mirror in this YA sci-fi murder mystery with a twisty ending you won't forget.