The new James Bond book Devil May Care has smashed the record for Penguin's fastest-selling hardback fiction title.
The 007 update, penned by Sebastian Faulks, sold 44,093 copies in the first four days of publication.
The novel, published to mark the centenary of the birth of the superspy's creator Ian Fleming, topped the book charts this week.
Previous Penguin best-sellers by the likes of Tom Clancy, Nick Hornby and Dick Francis have sold around 11,500 copies in the first four days, the publisher said.
Waterstone's recorded the highest sales of Devil May Care, with over 19,000 copies flying off the shelves.
A special £100 edition was sold out by noon on the first day of sale.
The store's fiction marketing planner Rodney Troubridge said of the sales: "It's unlikely to be superseded."
Faulks, best known for historic novels Birdsong and Charlotte Gray, received rave reviews for the novel.
He was selected to write the novel by Fleming's estate and read all the original stories in an attempt to capture the author's style.
The plot, set in 1967, is played out across exotic locations and several of the world's most thrilling cities.
Film company Eon Productions are said to like the book, but a big screen version of the story has not yet been announced.
More than 100 million Bond books have been sold and over half the world's population has seen a Bond film.
Previous authors of official Bond novels include Kingsley Amis, John Gardner and Raymond Benson.