The fourth book in the Tunnels series, Closer, is published in the UK on 3rd May, and the third book, Freefall, was released in the US on 1st February. The authors are visiting the US from 20th February to 4th March 2010, and the public events are listed here. The Tunnels series features fourteen-year-old Will Burrows, who life is turned upside down when his father suddenly goes missing. With the help of his friend Chester, Will discovers a tunnel under his house, and it brings him into contact with a hidden city called the Colony, and the terrifying and brutal race of people who rule it. These people are called the Styx, and they want to take control of the surface. If you thought you were safe, you'd better think again.
Tunnels, Deeper, Freefall and Closer can be purchased here: