Agatha Christie is celebrated as the most widely published author of all time, with her works being outsold only by Shakespeare and the Bible. She is revered by generations of fans as the greatest mystery writer ever, and her novels are cherished worldwide.

The Unexpected Guest unfolds as a thriller and a puzzler, set on a foggy estate in Wales. The mystery begins when a stranger stumbles away from his ditched car towards a country manor, only to find a man murdered and his wife standing over him with a gun. The woman appears dazed, and her confession seems unconvincing. The unexpected guest decides to assist her by blaming the murder on an intruder.

However, as the police delve deeper, they uncover clues pointing to a man who died two years ago, opening a Pandora's box of loves and hates, suspicions, and intrigues to the night air.

Originally crafted by Agatha Christie as a play in 1954, it has been artfully rendered into a novel by Charles Osborne. The Unexpected Guest is a compelling tale of murder and deceit, sure to entertain and amuse fans of Christie worldwide.