The fantastic first book in the Sunday Times bestselling Science of Discworld series
When  a wizardly experiment goes adrift, the wizards of Unseen University  find themselves with a pocket universe on their hands: Roundworld, where  neither magic nor common sense seems to stand a chance against logic. 
The  Universe, of course, is our own. And Roundworld is Earth. As the  wizards watch their accidental creation grow, we follow the story of our  universe from the primal singularity of the Big Bang to the internet  and beyond. 
Through this original Terry Pratchett story (with  intervening chapters from Cohen and Stewart) we discover how puny and  insignificant individual lives are against a cosmic backdrop of creation  and disaster. Yet, paradoxically, we see how the richness of a universe  based on rules, has led to a complex world and at least one species  that tried to get a grip of what was going on.
 Terry Pratchett is the acclaimed creator of the global bestselling Discworld series, the first of which, The Colour of Magic,  was published in 1983. Raising Steam is his fortieth Discworld novel.  His books have been widely adapted for stage and screen, and he is the  winner of multiple prizes, including the Carnegie Medal, as well as  being awarded a knighthood for services to literature. After falling out  with his keyboard he now talks to his computer. Occasionally, these  days, it answers back.
www.terrypratchett.co.uk
@terryandrob
 Professor Ian Stewart is the author of many popular science books. He is the mathematics consultant for New Scientist  and a Professor of Mathematics at the University of Warwick. He was  awarded the Michael Faraday Prize for furthering the public  understanding of science, and in 2001 became a Fellow of the Royal  Society.
 Dr Jack Cohen is an  internationally-known reproductive biologist, and lives in Newent,  Gloucestershire. Jack has a laboratory in his kitchen, helps couples get  pregnant by referring them to colleagues, invents biologically  realistic aliens for science fiction writers and, in his spare time,  throws boomerangs. Jack, who has more letters to his name than can be  repeated here, writes, lectures, talks and campaigns to promote public  awareness of science, particularly biology. He is mostly retired.