Sam Blake on The Murder of Roger Ackroyd, an Agatha Christie classic

Knowing where to begin with an author who wrote 66 books and 14 collections of short stories, selling over two billion copies, is a conundrum. The best-selling author of all time, Dame Agatha Mary Clarissa Christie’s career launched in 1920 with The Mysterious Affair at Styles, and she wrote six novels under the pseudonym Mary Westmacott, as well as London’s longest ever running play The Mousetrap, which opened in 1952. The book I began with, and often return to, is The Murder of Roger Ackroyd, which had a huge impact on the genre.