Headscratchers

'A fantastic and varied collection of problems authored by some of the best puzzle setters around' - Alex Bellos 'A book of delightful puzzles. It's just as good as you'd expect.' - Tim Harford 'A marvellous miscellany of mysteries' - Simon Singh 'Hours of arguing and puzzling. I loved it.' - Matt Parker This highly engaging collection of 70 puzzles comes from the popular weekly column in N...