The New York Times best-selling author of Magpie Murders and Moriarty brilliantly reinvents the classic crime novel once again with this clever and inventive mystery starring a fictional version of the author himself as the Watson to a modern-day Holmes, investigating a case involving buried secrets, murder, and a trail of bloody clues.

Sherlock Holmes is the greatest detective in literary history. For the first time since the death of Sir Arthur Conan Doyle, a new Holmes story has been sanctioned by his estate, whetting the appetites of fans everywhere. Information about the book will be revealed as deliberately as Holmes himself would unravel a knotty case, but bestselling novelist and Holmes expert Anthony Horowitz is sure to bring a compelling, atmospheric story to life.

Judith Potts is 77 years old and blissfully happy. She lives on her own in a faded mansion just outside Marlow, there’s no man in her life to tell her what to do or how much whisky to drink, and to keep herself busy she sets crosswords for The Times newspaper. One evening, while out swimming in the Thames, Judith witnesses a brutal murder. The local police don’t believe her story, so she decides to investigate for herself and is soon joined in her quest by Suzie, a salt-of-the-earth dog-walker, and Becks, the prim and proper wife of the local vicar.

In the sleepy village of Cookingdean, Dr Nell Ward is busy working in the grounds of a local manor house. Whilst inspecting an old tunnel, she did not expect to overhear a murder. As the only person with any clues as to what happened, Nell soon finds herself in the middle of the investigation. Desperate to clear her name Nell, along with her colleague Adam, set out solving the murder using their skills as ecologists to uncover details no one else would notice. But it soon becomes clear that playing Agatha Christie is much harder than it might, at first appear.

The village of Badger's Drift is the essence of tranquillity. But when resident and well-loved spinster Miss Simpson takes a stroll in the nearby woods, she stumbles across something she was never meant to see, and there's only one way to keep her quiet. Miss Simpson's death is not suspicious, say the villagers. But Miss Lucy Bellringer refuses to rest: her friend has been murdered. She is sure of it.