What are the most popular Agatha Christie crime novels?

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.

One of the most popular is 'Murder on the Orient Express'. It has a complex plot with a murder on a train full of suspects, each with their own secrets. Another is 'And Then There Were None', where ten strangers are lured to an island and die one by one in a very mysterious way. 'Death on the Nile' is also well - liked, with a murder taking place during a Nile cruise, involving love, jealousy and a web of lies.

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.

One of the most popular ones is 'Murder on the Orient Express'. It has a complex plot with a murder taking place on a train full of suspects, each with their own secrets. The solution is both surprising and satisfying.

One of the most popular ones is 'Murder on the Orient Express'. It features a complex mystery set on a train.

Some of the best ones are 'Murder on the Orient Express'. It has a complex plot set on a train where a murder occurs and the detective Hercule Poirot has to solve it. The confined space adds to the mystery.

I think 'A Pocket Full of Rye' is among the best. It's got an interesting storyline with a nursery rhyme as a motif for the murders. It shows Christie's creativity in using such elements to add an extra layer of mystery.

I think 'And Then There Were None' is very popular. It's a classic mystery where the sense of isolation and the slow build - up of tension as the characters are picked off one by one is really engaging. 'Murder on the Orient Express' is also a top choice. The claustrophobic environment of the train and the intricate plot make it a page - turner. 'The ABC Murders' is popular too, with the serial killer leaving clues in alphabetical order.

I think 'Murder on the Orient Express' is extremely popular. It has been adapted into movies multiple times, which shows its wide appeal.

Well, 'Death on the Nile' is extremely popular. The glamorous setting on the Nile River, along with the many characters with their own motives, is really fascinating. Also, 'The Mysterious Affair at Styles' is quite popular as it was the first Poirot novel. It introduced the character of Poirot and his unique detective methods.