Freefall

Freefall is the third book of the Tunnels series, which is written by Roderick Gordon and Brian Williams. It was published by Chicken House on May 4, 2009. It has two books preceding it, entitled Tunnels and Deeper, while it has two books succeeding it, entitled Closer and Spiral. The book Freefall chronicles Will Burrows and his friends Chester and Elliot as they venture even deeper below the Earth's surface. The boys find unexpected help for Elliott, who was injured in the group's fall down the Pore, and learn that the evil Rebecca twins are also loose in the depths -- and still focused on unleashing the Dominion virus on the unsuspecting Topsoilers. Will's adoptive father, Dr. Burrows, is caught up in events as well, and his determination to explore the book's bizarre, perilous subterranean world ultimately influences all of the other characters' fate.