How good are you at code-breaking? Can you solve this fiendish cumulative puzzle?
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.
Title of Most Fiendish Book goes to Conundrum: Crack the Ultimate Cipher Challenge by the ever-excellent science writer Brian Clegg. * Daily Mail, Books of the Year *