Twenty shelves, measured the same way on 17–18 September 2026, so they can be read against each other.
Look for the absent publisher, not the small field. Cryptograms have seven thousand competitors and not one traditional publisher on page one — books from this summer are already ranking with nine reviews. Spot-the-difference has three thousand competitors and is shut, because three publisher volumes own it. Field size tells you nothing; who is standing there tells you everything.
Puzzles for older readers admit newcomers. Journals do not. Word search, crosswords, sudoku, cryptograms and dementia-care activity books all carry recent self-published titles ranking beside Brain Games and AARP. Gratitude, habit and anxiety journals are held by publishers with 24,000 to 32,000 reviews apiece. Blank pages are won by voice; puzzles are won by craft.
The same puzzle changes character with its audience. Large-print word search is open to independents; the Bible version of it has no independent books at all. Sudoku for seniors lets newcomers lead; sudoku for children does not.
The only shelf of twenty with no traditional publisher on it at all — and books from this summer already rank.
Books from 2025 hold the top 1,500 and charge $13.99 while older ones charge $5.99.
Highest prices in the set — a five-month-old indie book holds rank 11,013 at $17.99.
A self-published book leads outright at rank 1,286 — ahead of Brain Games and a Disney licence.
Two self-published books from 2026 already outrank Brain Games and the New York Times.
An indie book at $4.99 leads it, ahead of a publisher series running since 2018.
Four books inside the top 700 on all of Amazon, self-publishers hold three of the top four.
High prices and an indie leader — with five of seven books on the same page effectively dead.
Crowded at the top, open at the bottom — two books from this spring hold page one with 3 and 16 reviews.
Quiet and static: the two best-ranked books were both published in February 2016 and still hold.
The same puzzle as the seniors' shelf, aimed at children — and materially harder for a newcomer.
Page count tracks rank almost perfectly: the 256-page book ranks 449, the 78-page book ranks 1,031,257.
The smallest field measured — 3,000 books — and still won by 240-page publisher volumes.
Education brands own it, but one indie workbook has held a top-8,000 rank since 2020 at double their price.
The faith version of our healthiest shelf — and here publishers hold every single slot.
Publishers hold seven of eight slots; the lone indie book sits at rank 45,923.
Winner takes all. One 2019 book owns it with 25,080 reviews.
Owned by a famous book's companion workbook at rank 712; the best indie tracker sits 30,000 places below.
The only shelf with no self-published book visible on page one at all.
The trap. Page one runs from rank 194,716 to 1,195,764 — everyone publishes here, nobody sells.
Every figure was read off Amazon.com on 18 September 2026: the organic results for that query with sponsored slots removed, then each listing's own page for rank, review count, publication date and length. Prices are US list prices at that moment and move constantly. Best Sellers Rank is a live position, not a sales figure — a rank read on a Tuesday can differ from the same rank on Sunday. “Indie” means the listing shows no traditional publisher, the closest public signal for a self-published title; it will occasionally mislabel a small press. Only paperbacks were counted. And know the width of the lens: this is the first page of one query — eight organic listings — not a census of the niche. A shelf that looks closed to newcomers here may be open on a neighbouring phrase, and seasonality is not accounted for: gift-driven categories rank differently in September than in November. One snapshot is not a trend.
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