The Fake Engagement

This is book 2. 

Eve continues to play Emily, and pretends she's a bestselling author. She doesn't like it but there isn't anything she wouldn't do for her sister. She and Max get closer as they both sink into a publicity stunt that is spiraling out of control.

Three book series

Book 1 - Mistaken Identity
Book 2 - The Fake Engagement
Book 3 - In Too Deep