What is it, a mystery novel?

The mystery novel is a novel that runs through and unlocks with suspense, and its content and subject matter are relatively free and extensive. Unlike horror novels, there are usually scary scenes and atmospheres, but mystery novels don't have to be. Of course, from a larger concept, horror novels are bound to have suspense, and can also be regarded as a branch of mystery novels. However, mystery novels and horror novels are completely different from ghost stories. The biggest difference is that one is a novel and the other is a story. The so-called novel must have three elements: plot, characters and environment. If there is only a plot, it is a story rather than a novel. The mystery novel is a kind of mystery literature, which can arouse people's instinct and stimulate people's curiosity.