Comp titles: reading the shelf you want to be on
The most useful research an author can do takes an afternoon, needs no tools, and is free. You find twenty books your reader already buys, and study them until you can say what they have in common.
Everything downstream gets easier: the cover, the trim size, the blurb, the categories, the price, the way a series is presented. You stop guessing what your shelf looks like, because you have looked at it.
What a comp title is
A comparable title — a comp — is a recently published book that shares your readers. Not your plot. Not your themes. Your readers.
Traditional publishers use comps to position a book: this is the audience, this is the format, this is roughly what it should earn. A self-publisher can use the same list for something more immediately useful — a design and marketing brief written by the market itself.
The distinction that trips people up: two books can share a premise and not share a single reader. A literary novel about a missing child and a police procedural about a missing child sit on different shelves, are bought by different people, and look nothing alike. Reader overlap is the test.
Finding twenty
Twenty, not five. Five books tell you about five designers. Twenty tell you about a category. The pattern only appears at volume.
Published in the last three to five years. Conventions move. A book from 2014 tells you what the shelf used to look like, which is worse than no information because it feels like information.
Steady sellers, not the one runaway hit. Every genre has the book everyone names, and it is the worst possible comp — it sold on brand, publicity and luck, its cover was allowed to break rules yours cannot, and its numbers are unrepeatable. You want the books ranked below it that sell week after week without an author anyone recognizes. That is the shelf you compete on.
Find them where readers find them. The also-bought rows under books like yours, the top of your real subcategory list, genre reader groups, the reviewers who cover your niche. If a book keeps appearing beside the same other books, that is the cluster you want.
Read the overlap, not the books
Go through the twenty once each, writing down facts rather than impressions. Then look only at what repeats.
- Palette. How many colors a typical cover uses, whether they run dark or light, warm or cold, and whether one accent color keeps appearing.
- Type. Serif or sans, weight and width, title above or below the image, author name large or small against it — Typography and hierarchy.
- Composition. Figure, object, landscape or pure type. Centered or offset. How much of the cover is empty.
- Trim size. Almost every category has a default, and a book printed off it feels wrong in the hand before anyone opens it — Choosing a trim size.
- Page count. Length is a genre expectation too. A category that runs 300 pages tells you something if your manuscript is 500.
- Price. Where the steady sellers sit, not where the outliers sit — Pricing a self-published book.
- Blurb structure. Count the paragraphs. Where does the hook sit, how long is the setup, is there a one-line closer? The shape repeats far more than authors expect — How to write a blurb that sells the book.
- Categories. Which lists these books actually appear in, which is often not the list you would have guessed — Categories and keywords, without the folklore.
- Series presentation. How book one signals there are more: a number on the spine, a series line above the title, a shared band or frame across the set.
Individual covers will pull your attention. Ignore them. The useful output is a short list of sentences like "seventeen of twenty are dark", "almost none use more than two colors", "the author name is small except on the three biggest names".
In the Cover Maker. Genre is the first thing you tell it, so the trim size it starts you on is the one your category is normally printed at — and the cover check renders your design at the sizes stores display, which is how you compare it against your twenty rather than against your own screen. Start a book → · about the Cover Maker
What to do with the answers
Meet the shared signals. Every repeated thing on that list is a promise your reader expects. Matching them is not copying, it is speaking the language. A cover that hits the shared palette, type register and composition reads as belonging on the shelf, and belonging is what gets it considered at all.
Then differ deliberately on exactly one axis. One. Same palette, unexpected composition. Same composition, a color nobody on the shelf is using. Same type weight, a handmade texture where everyone else has a photograph. That single difference makes yours the one remembered; everything else makes it look like the right book.
Two differences start to read as a different category. Three and you are a visitor again.
The errors that make the research useless
Comping upward. Listing the four most famous books in your genre. They tell you nothing you can act on, and in a pitch they read as naivety. No debut is comparable to the book that defined the category.
Comping to a decade-old bestseller. It sold enormously, so it feels safe, and its conventions retired years ago. Age is the first filter for a reason.
Comping by plot. The most common mistake and the most expensive. Similar story, different reader, wrong shelf — you design for an audience that was never going to buy your book.
The list keeps working
Keep the twenty. When your own cover is close to finished, drop it into a grid with them at thumbnail size and look at the grid, not at your cover. If it vanishes, you did not differ enough. If it looks like it wandered in from another aisle, you differed too much. That is the most honest review your cover gets before readers see it — The thumbnail test.
Make yours
Everything here is built into the tools, and they are free to use: name your book, bring your manuscript or your artwork, and work as long as you like. You only pay when you want the files without the preview watermark.
Next: Genre conventions: what your cover has to promise · More: When to redo a cover, and when to leave it alone · What makes a book cover sell