Hearts on Fire by Piper Davenport

Cullen
I married the love of my life the day we turned eighteen. She died two years later, and I vowed I’d never love another woman. I’ve kept that vow.
Until now.
When a series of unexplained fires start destroying my family’s constructions sites, the bossy but beautiful arson investigator not only gets down to business, she gets under my skin.

Helena
I have one last chance to prove to my boss that I can keep my emotions out of my job. The problem is, the ‘job’ happens to be the gorgeous owner of a family construction company who someone wants to destroy.
I’m falling in love with a man who’s wholly unavailable and I must get to the bottom of who wants to ruin him and his brothers without losing myself, or my life, in the process.