Professor Stewart is best known for his popular science writing – mainly on mathematical themes. He is one of the UK’s most prolific popularisers of mathematics and has published more than 120 books on a number of different fields of science. But he may be best known for his The Science of Discworld series he co-wrote with Sir Terry Pratchett and Jack Cohen. With Cohen, Stewart has also written two science fiction novels, Wheelers and Heaven, and one of his own called Jack of All Trades. His latest novel is The Living Labyrinth (with Tim Poston), which came out last year with a sequel on the way. He has won numerous prizes in the academic field, was a Hugo Nominee in 2000, and was elected a Fellow of the Royal Society in 2001.