David has just started dating Senna, a beautiful but strange girl at his school. When she is sucked into another world, David along with Senna's sister and friends are dragged along, waking up in another universe where gods, ancient tribes, and mythic creatures do battle. David has sworn to do anything to rescue Senna, but they have to find her first.

I really loved the crisp writing style of this book. Every sentence is concise and powerful, never wasting words, and describing entire civilizations with just a paragraph or two. The writing is quite vivid, and I enjoyed the frantic energy of the pacing.

The world-building is just a mish-mash of different ancient civilizations thrown together in an alternate universe, Egyptians, Aztecs, Greeks, Vikings, etc... It's not exactly original, but it works fine for the story.

I was really interested in the memorable characters, and enjoyed gradually getting to know them better. David, wanting to prove himself, and show the world that he is courageous and strong, desperate to be a hero. Senna, the mysterious, cold-hearted beauty with a mystical secret. Senna's sister, April, clever and quick-witted, with a resilience and humor that keeps everyone else calm when things go wrong. The ex-boyfriend, Christopher, the funny guy, known for being a clown, but not exactly brimming with useful ideas. And Jalil, the brain of the group, whose thoughts are racing three steps ahead of everyone else.

The book ends on a terrible cliffhanger, right as they are all about to die in battle against an ancient god. Even so, I'm not sure that I am invested in the story enough to continue reading the rest of the series. I just don't care enough about the characters to keep reading. It's a good story and I liked it, but I don't think I want to invest more time and energy into this series.