Solstice by P.J. Hoover***

Solstice is about Piper, a girl living during the worst global warming ever. The temperatures are almost always over 100 degrees Fahrenheit. When a new boy, Shayne, arrives, everyone, especially Piper, is head over heels. Shayne seems to only have eyes for Piper, which surprises her a lot. Then she learns that her friend is going to die. On the day her friend is going to die, Shayne comes with an angel. Piper pleads with Shayne not to kill her friend, so Shayne takes her to the Underworld. Piper now embarks on a journey filled with mythology and betrayal to love and death.

This book was okay. I wasn't impressed by it at all. It had some good parts, I was very surprised by the use of mythology though. I think anyone who's a fan of Rick Riordan would really like the mythology parts, but maybe not the rest.