O MY GOODNESS PERCY'S BACK!!! My little guy is all grown up and defeating monsters right and left! I'll admit that it's a little insane how endeared I am with a fictional character. But its PERCY guys! He's my favorite little demigod and I just love reading about his adventures. The Lost Hero was an interesting start to the spinoff series but The Son of Neptune had the humor and heart that I felt was lacking in The Lost Hero. 
 In The Son of Neptune we get to see Percy's side of the swap with Jason. I liked that we got to see Camp Jupiter because up until now we really had no clue about how they did things over there... or that it even existed. Camp Jupiter is abundantly different than Camp Half-Blood. The original series would have been almost entirely different if it would have been set in the Roman camp. It's a great addition to the universe and keeps the story fresh by providing a new perspective on the world we have been already introduced to. 
 We get to see some of our old friends from Camp Half-Blood (view spoiler)[ Nico, Tyson, and Mrs. O'Leary (hide spoiler)] and are introduced to some new additions to the Prophecy of Seven. We meet Frank (son of Mars) and Hazel (Daughter of Pluto and Nico's sister) from Camp Jupiter. They also have tragic back stories much like Piper and Leo from The Lost Hero but they didn't feel quite as dark. I'm not sure if it's because I was desensitized to the dark backstories from the last book or if the light heartedness in The Son of Neptune helped smooth the edges. Either way, I warmed to them pretty much immediately where as I'm still learning to love Piper, Leo, and Jason. O and also Percy, Frank, and Hazel make another new friend in Ella, a prophecy reciting Harpy. I wonder if there is a possibility of Ella and Rachel meeting. It would be interesting to see how they would get along. 
 Overall, I'm incredibly happy that Percy is back and we get to go on more adventures in this universe. The whole "Olympians" series, all spinoffs included, is such a pleasure to read. It's funny; it has heart, and it just an overall captivating read. Maybe I'm biased but Percy is one of my favorite protagonists out there. Yes, he is an awesome fighter and all but what really gets me is his heart. He's extraordinarily kind and at the same time quite funny. I can't wait to move onto The Mark of Athena and see what's going to happen next, especially for Annabeth.