Read my non-spoilery review on Book Nerds Across America: http://www.booknerdsacrossamerica.com... 
 Full review below: 
 (view spoiler)[ 
 I lied, this isn't really a review so much as me rehashing all my feels! Bob!!! :( And Frank is really hot! And I love that Leo fell in love and that it created a little change in him. And I love that Nico had a crush on Percy. This is especially cool because these books are generally geared for younger kids, and I really love that earlier on they get to see that, "Hey, it's okay to love who you love. You'll still have friends and people who will stand by you." 
 I also really enjoyed how well things that happened in the past books were woven into this story. I guess when you write all the adventures you remember them all, but, like, when they kept referring to things like, "Oh yeah, Annabeth killed this monster in this way back at this place," I pretty much never remembered what they were talking about. 
 I'm a little confused though -- if Gaea is rising in Camp Half Blood, why are going to Athens? Is that where all the giants were sent? 
 Book 5 of PJO was my favorite in the series, and it was basically a straight up war book. I wonder if Book #5 of this series will be similar. (hide spoiler)]