"* THE PHENOMENAL SUNDAY TIMES BESTSELLER FROM THE QUEEN OF COSY CRIME * A SUNDAY TIMES BEST BOOK OF 2022 A TELEGRAPH BEST BOOK OF 2022 A GUARDIAN BEST BOOK OF 2022 A FINANCIAL TIMES BEST BOOK OF 2022 'Every page is a joy. The queen of unreliable narrators' SUNDAY TIMES 'Brilliant - a mind-bending, heartwarming mystery not to be missed' OBSERVER 'She's an absolute master of what she does' RICHARD COLES Can you crack the Twyford Code? Edith Twyford was once a world-famous children's author, but now her only legacy is the rumoured existence of the Twyford Code: a series of clues hidden in her books leading to... what? No one knows - but that hasn't stopped the speculation. Steve Smith can trace nearly all the bad things in his life back to Edith Twyford. As a child he found one of her books, covered in strange symbols. He showed it to his teacher, Miss Iles, who was convinced it held the key to the code. Within weeks Miss Iles had disappeared, and Steve has no idea if she is dead or alive -