Expecting the Rancher's Child (Callahan's Clan, 1)

The rich rancher's irresistible offer… Only from USA TODAY bestselling author Sara Orwig! 

From the moment they met, their intense attraction has been off the charts. It's rendered Blake Callahan's judgment inoperative. Because the billionaire rancher has offered millions to lure Sierra Benson away from her charity organization to work for him. The offer's just too good for the former designer to refuse.  

Working together at Blake's ranch, there's no escaping the powerful desire that draws them closer. But Blake's driven by his need for revenge against his father, while Sierra is all about helping those in need. So how will they bridge their differences when Sierra discovers she's pregnant?