Knowing Jack by Rachel Curtis is a lovely, angst-filled romance about a girl in danger and her bodyguard and how they slowly fall for each other. 
 It's a non-stop push and pull between Jack and Chloe. She goes in and he pulls back. She pulls back and goes on a date (NOT with Jack) and he pushes his way back in. Back and forth while they decide if they are willing to cross the boundary between bodyguard and client. 
 The very minor cliffhanger at the end of the book hints at another story to come. It will be interesting to see what happens next with this intense couple.