Ahh, Rick Riordan is a genius! Darn cliffhanger though! Ugh, there were more pages after, so I thought it was the end of the chapter, but when I turned the page, I got the glossary. 
 I cannot believe how Riordan thought of all this--this book is so carefully planned!! It flabbergasts me, haha. Anyways, to a review! 
 Percy is lost, without any memory of his past (except the name Annabeth!), but he knows he must go to Camp Jupiter. Camp Jupiter is a Roman camp, and his presence is not widely appreciated. The new characters have so many connections to past ones we've met--so crazy! A new character is Frank, a baby-faced burly guy who feels out of place--especially since his 16th birthday passed and he hasn't been claimed. He and Hazel, daughter of Pluto (Hades), are very close friends. Hazel is also somewhat of an outcast because of all the rumors about her past and how she got here. Reyna, a "new" character, is one of the two praeters of the camp (the other would be Jason Grace, who we met in the first Heroes of Olympus), so she's basically in charge now. Octivian is the Camp Jupiter's version of an oracle... kind of. He uses sacrifices to do his work, but instead of using real animals, he uses stuffed animals. Yeah, he's pretty creepy. 
 There is panic throughout camp, as monsters cannot be killed (well, they can die, but they just can't *stay* dead). Death, or Thanatos, has been chained in Alaska (where the gods cannot help them) so he keep souls from escaping after they have died. So when Percy arrives to Camp, the three are all destined to go on quest to find Death and free him so what's dead can stay dead. They also have a part in the Prophecy of Seven.... 
 And that's all I want to say! This book isn't a lame sequel with trivial words; so much goes on! Gosh, I didn't do the book justice... SON OF NEPTUNE is an engrossing read pack-full of adventures--I still can't fathom all that creativity Rick Riordan has. I can't really explain it well; just read the book!!