My Fault

My Fault is the first novel in Mercedes Ron's bestselling Culpable (Culpables) trilogy. Originally serialized on Wattpad, where it won a 2016 Watty Award, it was published in Spain in 2017 by Montena. Seventeen-year-old Noah's world is turned upside down when her mother marries the wealthy William Leister and the family moves into his mansion.

Immediately at odds with her new stepbrother, Nick — closed-off, volatile, and secretly involved in illegal street racing — Noah finds their animosity giving way to an intense, forbidden attraction neither of them can fight. As the stepsiblings grow closer, a dangerous chapter from Noah's past resurfaces, putting everything at risk.

My Fault was adapted into a hit 2023 Prime Video film and blends steamy enemies-to-lovers romance with dark family drama.