Murder mystery puzzle book Murdle tops UK Christmas bestseller chart

GT Karber's book of challenges beats Richard Osman's The Last Devil to Die and Guinness World Records to top spot

The murder mystery puzzle book Murdle by US writer GT Karber has climbed the UK bestsellers chart to become this year's Christmas No 1 book, beating Richard Osman's The Last Devil to Die and Guinness World Records for the top spot.

Murdle is based on the daily puzzle website Karber developed in 2021, and across the book's 100 challenges, readers must use codes and maps to decipher who the killers are. It has sold more than 200,000 copies since its publication in June, according to Nielsen BookScan's chart. Almost a third of those sales have been in the last month, after it was named Waterstones' gift of the year at the end of November.