It's hard to say which one is the most popular as it can vary among different readers. However, some of her well - known works from around that time are quite popular. For instance, 'And Then There Were None' was published in 1939 and is extremely popular. It has a very unique and chilling premise where ten people are lured to an island and are killed off one by one in a seemingly inescapable situation.
Another possible contender for the most popular 1939 Agatha Christie novel could be one that features her famous detective Hercule Poirot. Christie's Poirot novels are always in high demand. If there was a Poirot novel in 1939, it would have attracted a large number of fans. His methodical and brilliant detective work makes these novels very engaging. He picks up on the smallest of details that others miss, and his Belgian - French background adds an interesting cultural element to the stories.
Definitely 'Murder on the Orient Express'. It has been adapted into movies multiple times, which shows its popularity. The setting on the train and the diverse cast of characters make it really engaging.
Probably 'Murder on the Orient Express' is one of the most popular. Its unique setting on a train, a confined space where a murder occurs, and the complex web of characters and motives make it very appealing. The solution to the mystery is also quite unexpected.
One of her most popular novels is 'And Then There Were None'. It's a classic mystery where ten strangers are lured to an isolated island and are killed one by one, leaving readers on the edge of their seats trying to figure out the identity of the killer.
One of the most popular is 'Murder on the Orient Express'. Everyone loves the way Poirot solves the mystery on the train. 'And Then There Were None' is also very popular. It has such a unique plot. Another popular one is 'The Body in the Library'. It has all the elements of a classic Christie mystery.
Among the top 20, 'The Body in the Library' stands out. It has the typical Christie charm with a mystery in a small - town setting. The characters are well - drawn and the mystery keeps you guessing. 'Five Little Pigs' is also a great read. The way Christie reconstructs a past murder through the accounts of five different people is very clever. 'Evil Under the Sun' set on an island is full of suspense and the red herrings she throws in make it a great mystery novel.
Probably 'Murder on the Orient Express'. It has a large and well - known cast, and the story is one of Christie's most famous. The allure of a murder mystery set on a luxurious train in a bygone era attracts a wide audience. The film adaptation in 2003 managed to capture the glamour and the enigma of the original story, making it quite popular.
Well, 'The Murder of Roger Ackroyd' is also very popular. It has a great plot twist that really shocked readers. 'Death on the Nile' is another well - loved novel. It takes place on a cruise ship and has a complex web of characters and motives.