How good are you at code-breaking? Can you solve this fiendish cumulative puzzle? The ultimate trial of knowledge and cunning, Enigma features 200 cryptic puzzles and ciphers. The solutions link throughout the book - so you need to solve them all to get to the final round. With a focus on ciphers and codebreaking, Enigma contains twenty sections, each built around a specific subject from music to literature, physics to politics. To take on Enigma you need good general knowledge and the ability to think laterally. But if you need help, there are plenty of hints to point you in the right direction. Whether you attempt to crack it alone or work in a team, Enigma will challenge you to the extreme. Can you take on Enigma and win? There's only one way to find out ... AUTHOR: Brian Clegg's most recent books are The Reality Frame (Icon, 2017), What Colour is the Sun? (Icon, 2016) and Ten Billion Tomorrows (St Martin's Press, 2016). His Dice World and A Brief History of Infinity were both longlisted for the Royal Society Prize for Science Books. He has also written Big Data and Gravitational Waves for Icon's Hot Science series. Brian has written for numerous publications including The Wall Street Journal, Nature, BBC Focus, Physics World, The Times and The Observer. He is editor of popularscience.co.uk and blogs at brianclegg.blogspot.com.