Agatha Christie's most daring crime mystery - an early and particularly brilliant outing of Hercule Poirot, 'The Murder of Roger Ackroyd', with its legendary twist, changed the detective fiction genre for ever. Poor Roger Ackroyd. He knew the woman he loved had been harbouring guilty secret. And then, yesterday, she killed herself. But guilty secrets rarely stay secret. Who had been blackmailing her? Had it really driven her to suicide? Sadly, Roger Ackroyd wasn't going to live long enough to find out. Solving the Queen of Crime's most twisty mystery just got even more fiendish in this gorgeous new hardback collector's edition - with the final solution sealed in an envelope at the back of the book! Can you crack all the clues and catch the killer before you unseal the ending?.