KDP keywords for mystery authors: filling all seven boxes
Seven boxes, up to 50 characters each. Here's what KDP actually says, where mystery authors waste space, and example sets you can adapt.
What KDP says
- Up to seven keywords or short phrases. KDP's help page also says to watch the character limit in each field. KDP's own metadata guide puts that at 50 characters per box.
- Think like a reader. Combine words in the order people search ("military science fiction," not "fiction science military").
- Useful types: setting, character types, character roles, plot themes and story tone.
- Test before you publish: search Amazon with your candidates and look at the suggestions in the search drop-down.
- You can change keywords as often as you like.
What KDP says to avoid
- Words already in your title, contributors or categories (they're covered elsewhere)
- Subjective claims ("best mystery ever")
- Time-sensitive words ("new," "on sale," "available now")
- Words common to everything in the category ("book")
- Spelling, spacing, punctuation and plural variants of the same word
- Other authors' names, and brands you don't own
- Quotation marks, Amazon program names like "Kindle Unlimited" or "KDP Select," and HTML
The 7-keyword builder checks for every one of these.
Where mystery authors waste boxes
- Typing "mystery" in every box. One appearance does the job; the other six repeats are wasted characters.
- Repeating the subtitle. If your subtitle already says "A Cozy Mystery," don't spend a box on "cozy mystery."
- "Kindle Unlimited mystery". KDP lists program names as something to avoid.
- Single broad words. "Thriller" alone tells Amazon almost nothing about your thriller.
- Leaving boxes empty. Every empty box is a reader search you can't show up for.
A box-by-box plan for mystery
| Box | Use it for | Cozy example | Procedural example |
|---|---|---|---|
| 1 | Subgenre + format | culinary cozy series | british police procedural |
| 2 | Sleuth type | amateur female sleuth | woman detective inspector |
| 3 | Setting | small town christmas | glasgow murder squad |
| 4 | Hook element | bakery cat sidekick | hospital serial killer |
| 5 | Tone | clean funny whodunit | dark tartan noir |
| 6 | Trope or structure | village gossip suspects | race against time manhunt |
| 7 | Reader "also likes" | gentle crime for women | gritty crime fiction scotland |
These are examples to show the structure, not search-volume data. Test each phrase with Amazon's search suggestions before you use it.
Psychological thriller example set
domestic suspense marriage · unreliable narrator · husband second phone · suburban neighbor obsession · twist ending women's fiction · gaslighting wife revenge · missing sister secrets
Each phrase covers a different angle (structure, character, situation, theme) and none repeats another box's main words.
Revisit them
Keywords aren't set-and-forget. If you run Amazon Ads, the search-term report shows real phrases that led to clicks and sales. Several r/KDP authors describe moving their best-converting ad search terms into their keyword boxes.
Sources
- KDP Help, "Make Your Book More Discoverable with Keywords": kdp.amazon.com/help/topic/G201298500
- KDP, "Discovering Metadata 2021" companion PDF (50 characters per field): m.media-amazon.com/images/G/01/kindle-publication/webinars/KDP_Companion_for_Discovering_Metadata_2021_1.pdf
- r/KDP, "Keywords" thread: reddit.com/r/KDP/comments/1rl7wd4/keywords/