Under His Protection (City Lights #2)
Lily Bishop

Two jaded loners find a connection, but nothing is as it seems. As Lee digs deeper for answers, he only finds more questions, uncovering a conspiracy that goes deeper than they every suspected. When those closest to you betray your trust, nothing is sacred.
This book follows Lee Thornton, brother to Fox Thornton, in No Strings Attached. It can be read as a stand-alone, but if you want to start at the beginning, read No Strings Attached, City Lights Book 1.