Well this took me by surprise. 
I will admit I went into this a little apprehensive because Sager is a hit or miss author for me, but this was a hit! This was my 6th book I've read by him and dare I say this was my favorite? I liked that there wasn't 8 plot twists happening (hello, The Only One Left...), but this book still kept me on my toes. I liked Sager writing in a males perspective, I think I liked that the most about the story. Ethan was a great protagonist who I was rooting for, but sometimes wasn't sure if I should be.