Bind Me (Capture Me #2) by Anna Zaires

He’s determined to break her.
For Lucas Kent, his new prisoner is a maddening contradiction: compliant yet defiant, fragile yet strong. He needs to uncover her secrets, but doing so may ruin everything.
His obsession could destroy her.
She’s determined to escape.
For Yulia Tzakova, her captor is the man of both her dreams and her nightmares: tender one moment, cruel the next. She can’t let him crack her, but resisting him may leave her broken.