True Bastard

He's a bastard bathed in sin. She's an angelic nun. Are they secretly the match made in Heaven? Hot on the trail of his evil father, Liam Harker is a no-nonsense Chicago cop willing to take the law into his own hands. But when he's faced with the impossible task of investigating Finch's finances, he'll need to call in a favor and enlist the help of an unlikely ally. Catriona is a novice nun with a heart of gold and a talent for numbers.
From the moment she meets Liam, he makes her heart flutter - but she took a vow, and no dashing cop is about to make her give up her Holy path. But despite her protests, she can't hide the exhilarating way he makes her feel. Tormented by his own scars and magnetically drawn to the angelic nun, Liam is torn between his duty to his brothers and his impossible attraction. But things are heating up - and the closer they get to the truth, the more deadly Finch becomes.
Liam knows his sins run deep... but he's willing to go through the flames of Hell to make Catriona his forever. Has Liam found his angel of mercy? And can they ignore their burning desires long enough to bring the Devil incarnate to justice?