Conundrum

**'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** The ultimate trial of knowledge and cunning, Conundrum 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 cipher...