Raymond Chandler’s 10 rules for writing a detective novel:
- It must be credibly motivated, both as to the original situation and the dénouement.
- It must be technically sound as to the methods of murder and detection.
- It must be realistic in character, setting and atmosphere. It must be about real people in a real world.
- It must have a sound story value apart from the mystery element: i.e., the investigation itself must be an adventure worth reading.
- It must have enough essential simplicity to be explained easily when the time comes.
- It must baffle a reasonably intelligent reader.
- The solution must seem inevitable once revealed.
- It must not try to do everything at once. If it is a puzzle story operating in a rather cool, reasonable atmosphere, it cannot also be a violent adventure or a passionate romance.
- It must punish the criminal in one way or another, not necessarily by operation of the law. … If the detective fails to resolve the consequences of the crime, the story is an unresolved chord and leaves irritation behind it.
- It must be honest with the reader.


































