Fans are on a clue-hunt to find 50 signed copies of JK Rowling’s recent Robert Galbraith novel Career of Evil in bookshops across the UK.
The hunt asks fans to use their own detective skills to find the "rare" signed copies - part of Little, Brown's #MakeMeADetective paperback campaign.
To kick off the game, the publisher posted a series of clues online leading to secret locations where fans could find limited signed copies of the novel. Each clue was an anagram of a location that appeared in the book, which fans needed to decode to work out which bookshops the copies were being held in. They were then encouraged to pick up their signed copy from a local bookshop in the area, by saying "Make Me A Detective" to the person manning the till.
Four bookshops are participating, including Waterstones branches, holding on to 10 signed copies of the book each for fans to collect. A further 10 copies were made available for online-only entrants.
The competition launched on 21st April, the date the paperback published, and will close only when all signed copies have gone. The social element of the campaign where fans could enter online was live for just under a week from Friday 29th April to Wednesday 4th May.