"A smart, witty, original take on the festive season, with calculations and theories to help you prepare and solve your Christmas conundrums." * The Sun * "Just in case the charm and beauty of mathematical thinking has passed by some of your friends and family, they will be grateful for this slim volume in their stocking. The puzzles and games of Hannah Fry and Thomas Evans involving present-wrapping and Queen's Speech bingo are but an entry drug for heady passages about the natureof truth and game theory." * New Scientist * "From the perfect Secret Santa gift to finally proving the existence of St Nick, a new book uses mathematics to crack the toughest festival conundrums." * Evening Standard * "The broadcaster and author of The Mathematics of Love teams up with a mathematician and writer for this intelligent stocking filler ... sounds enormous fun." * Caroline Sanderson, The Bookseller *

Dr Hannah Fry is a mathematician from University College London. In her day job she uses mathematical models to study patterns in human behaviour, from riots and terrorism to trade and shopping. You'll also find her on BBC radio and television where she regularly presents science programmes, or on Youtube's Numberphile channel.Dr Thomas OlUron Evans describes himself as a mathematician and a writer, though how others would describe him is anyone's guess. He used to be a secondary school teacher, but managed to escape and now has a research and lecturing job in London. While broadly agreeable, this does make life a little complicated, since he lives in Strasbourg, France.