Pit your wits against the people who created Sudoku: the puzzle masters of Japan.
Alex Bellos is an author and broadcaster whose specialises in mathematics and Brazil. When he was the Guardian's correspondent in South America he wrote Futebol: The Brazilian Way of Life, a look at contemporary Brazil seen through football. It was a huge critical success, and led to his being asked to ghostwrite Pele: The Autobiography. He is also the author of the popular math books Alex's Adventures in Numberland and Alex Through the Looking-Glass, which were both bestsellers in the UK. The former has had more than 20 translations and won several awards.