I read an amazing book called Freefall, by Roderick Gorden. It is in the middle of the Tunnels series. This fiction book is about three kids, Will, Chester, and a girl named Elliot. They are trapped underground because of a battle with the Styx in a previous book. The Styx are a group of people who live deep in the Earth's crust and they would do anything to get power and poison all Topsoilers. Topsoilers are the people who reside above ground. The three kids have to stop at nothing to get back out and defeat the Styx before they release a terrible virus above ground. I liked this book because it was told like a vivid dream with lots of description, and the ending was somewhat unpredictable. However, you are left with a cliffhanger at the finish because the series isn't anywhere near over yet. A lot more adventure and danger is foreshadowed, though. I can't wait to read the rest of the story!