What defines the “mystery” genre?

What defines the “mystery” genre?

Mysteries come in many different flavors, from cozies to hard-boiled detectives.

So what unites all these disparate plots under one umbrella?

All mysteries share 3 things in common

  1. A secret, unknown to both protagonist and reader, that poses a story question
  2. A protagonist in search of an answer to that story question
  3. Clues to allow an alert reader to solve the mystery

In order to earn its spot on the Mystery Shelf, a book must have each of these three elements.

Books that have 1 or 2 of the elements may have elements of mystery to them but should be categorized separately (i.e. Romance with mystery elements, or Thriller with mystery elements).

Examples

A is for Alibi by Sue Grafton

✓ A secret: Who killed Lawrence Fife?

✓ A protagonist: Kinsey Millhone, a private investigator

Clues: the allergy pills, the dead dog, the tax records 

✓ A Mystery

Titanic (1997)

✓ A secret: What happened to the Heart of the Ocean?

❌ A protagonist: At first it seems like Brock Lovett may be the protagonist, but it’s actually Rose (and she knows the answer)

Clues: There are no clues about the necklace’s whereabouts 

❌ NOT a Mystery