Breaking Promises by M.A. Lee

Is love enough?

When Lauren and Isaac set off to plan their live together, they never expected the lies, deceit, and danger that was about to take over their lives.
After Isaac falls into the trap of an illegal car theft ring, he discovers that he can’t resist the money or temptation of power it offers.

When Lauren discovers what Isaac is up to, she ends her engagement and relationship with the man of her dreams.
Broken and determined to get Lauren back, Isaac stops at nothing to win her back. Only, his plan is deflated by a girl with a plan and a secret that could destroy Isaac’s chances of ever getting Lauren back.