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. Stephen Baxter is one of the UK's most acclaimed writers of science fiction and a multi-award winner. His many books include the classic Xeelee sequence, the A Time Odyssey novels (written with Arthur C. Clarke) and The Time Ships, a sequel to H G Wells' The Time Machine. He lives in Northumberland.