Author of the bestselling Discworld series, Terry Pratchett is one of the UK's most popular - and bestselling - writers. His books have sold over 65 million copies worldwide and been translated in to nearly 40 languages. He was awarded an OBE in 1998 and knighted in 2009 for his services to literature. He lives in Wiltshire. Born in 1957, Stephen Baxter is one of the UK's most acclaimed writers of science fiction. Amongst his many books are the classic Xeelee sequence, the Time's Odyssey novels (written with Arthur C. Clarke) and Time Ships, a sequel to H G Wells' The Time Machine. He lives in Northumberland.