God of Ruin (Legacy of Gods, 4) by Rina Kent

From USA Today bestselling author Rina Kent comes the fourth in a dark and steamy college romance series featuring elite criminal families and morally gray heroes. Mia Solokov has one goal: ruin Landon King for messing with her family. But this sociopathic, genius artist might just ruin her instead.

I'm out for revenge.

When Mia Sokolov, Mafia heiress and selective mute, successfully gives Landon King a taste of his own medicine, she discovers that her actions may have unwelcome consequences.

Landon King is a genius artist, a posh rich boy, and Mia's nightmare. Now, he's obsessed with her. He's never met someone with the same penchant for mischief as himself. But he realizes that beneath Mia's hard outer shell, she is struggling with something that is too horrible to say aloud. 

Mia can't seem to shake Landon and finds herself increasingly attached to him, despite his seemingly constant ability to make her angry and his psychotic tendencies that always push her a bit too far.

And as Landon gets closer to the truth about Mia's past, danger lurks just around the corner. Mia has learned to trust Landon…but will he protect her or ruin her?