This is a review of the entire series. Woah. That was awesome. Nick and Allie are both in cars and accidentally crash into each other.They see this tunnel with a light at the end of it, but don't go in. And then, they wake up in a forest and find out its been nine months. And then, they find out if they step on land, they will sink to the center of the Earth.The characters were very interesting. I like the different viewpoints. I could relate with the characters.The setting was well written, as was the dialogue.The plots of all the books seemed reasonable.I was a little confused and bored throughout the novels, but otherwise, the series was great.Find this review and more at http://www.thereadingobsession.blogspot.com.