Perilous Problems for Puzzle Lovers

Alex Bellos is the bestselling author of ;i>Alex's Adventures in Numberland;/i>, which was shortlisted for the BBC Samuel Johnson Prize. He is the i>Guardian's maths-blogger, and has worked for the paper in London and Rio de Janeiro as its unusually numerate foreign correspondent. He is a curator- in-residence at the Science Museum and has a degree in Mathematics and Philosophy from the University of Oxford.

He made the shortlist for the 2015 Royal Society Winton Prize for Science Books with his title, Alex through the Looking-Glass: How Life Reflects Numbers and Numbers Reflect Life.

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