I think 'And Then There Were None' by Agatha Christie is a classic choice. It's a brilliant mystery with a clever setup and a surprise ending that you won't see coming.
I highly recommend 'The Da Vinci Code' by Dan Brown. It's full of twists and turns that keep you on the edge of your seat.
A good mystery novel often has a complex plot. It should keep the reader guessing, like in 'The Hound of the Baskervilles' where you're constantly trying to figure out who the real villain is. Strong characters also matter. For example, in 'The Maltese Falcon', Sam Spade is a memorable character. The setting can enhance the mystery too. In 'The Shining', the isolated hotel setting adds to the sense of unease and mystery.
One great novel mystery is 'The Girl with the Dragon Tattoo' by Stieg Larsson. It has a complex plot full of mystery and intrigue.
Agatha Christie's 'Murder on the Orient Express' is a classic mystery novel. The setting on the train and the numerous suspects make it really engaging. Christie is a master of creating suspense and unexpected revelations.
Well, 'Gone Girl' by Gillian Flynn is a really popular mystery fiction book. It has a very twisted plot that makes you question everything. Then there's 'In Cold Blood' by Truman Capote, which is based on a true crime and is written in a very engaging way. And don't forget 'The Big Sleep' by Raymond Chandler, which features the iconic detective Philip Marlowe.
Agatha Christie's some works are also free in some libraries or online platforms. Her mystery stories with complex plots and interesting characters are always engaging.
Look at the reviews. If a mystery novel has a lot of positive reviews from readers who love the genre, it's likely to be a good choice.
One great mystery novel is 'The Girl with the Dragon Tattoo' by Stieg Larsson. It has a complex plot full of twists and turns. The characters are very well - drawn, especially the main character Lisbeth Salander, who is a unique and fascinating figure.
Agatha Christie's 'Murder on the Orient Express' is also a complex mystery. The plot is full of twists and turns as Hercule Poirot tries to figure out who among a group of passengers committed the murder on the train. There are multiple suspects, each with their own secrets and motives, which makes it a classic in the complex mystery genre.
I would recommend 'The Girl with the Dragon Tattoo' by Stieg Larsson. It combines mystery, thriller, and some elements of crime investigation. The main character, Lisbeth Salander, is a very interesting and complex figure.
Some excellent ancient mystery novels include 'Le Morte d'Arthur' by Sir Thomas Malory. It contains elements of mystery within the Arthurian legends, like the mystery of the Holy Grail. 'The Decameron' by Giovanni Boccaccio also has some mystery - laden tales. And 'The Canterbury Tales' by Geoffrey Chaucer has stories with elements of mystery, such as the Pardoner's Tale which has an air of mystery about the motives of the characters.