This was very intriguing! I liked this even more than the first one. This answered many questions but also presented some new ones. I loved learning those little details from Charlie and Silas' past. It seems like they were a really cute couple before everything happened (and I obviously mean the things between their fathers, not this not remembering thing) and I loved the letters Silas read. 
 I have to mention how delighted I was when Silas told Landon everything! I love good sibling relationships in books and in real life and I was so happy to see Silas trusting his brother and Landon not running away. 
 And omfg, a cliffhanger again?! I actually shrieked when I saw those three dots.