You tend to remember the day your parents disappear. It's one of those things that sticks in your mind. Another of those things is the incredible discovery that behind your dad's office door lies an intergalactic portal . . .

When both of these things happen to William Seward and his brother Daniel they're left with two questions. What are they going to do now? And where are their parents?

Warm, funny, accessible fiction, perfect for boys and girls aged 9 to 12.

There are 224 pages in this book. This book was published 2007 by Penguin Books Ltd .

Andrew Norriss is the Whitbread Award (now Costa) - winning author of Aquila, which was made into a BAFTA-nominated TV series. His previous novel, Jessica's Ghost, was shortlisted for the Costa Award.