KDP categories · Top KDP authors
Helen Scales: Amazon KDP author data
As of Nov 6, 2026, Helen Scales has 16 books on Amazon, 14 of them on a best-seller list in the last 30 days (best rank #2), mostly in Marine Life, Seashells, Marine Biology.
| Median price | $13.96 |
|---|---|
| Price range (middle 50%) | $10.41 – $17.67 |
| Median reviews | 46 |
| Total reviews | 2,061 |
| New listings (30 days, incl. new editions) | 1 |
| Breakout books (30 days) | 0 |
What stands out
- 88% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
Helen Scales's best-ranked books
-
Spirals in Time: The Secret Life and Curious Afterlife of Seashells
by Helen Scales
- Price$14.99
- Rating4.5
- Reviews352
-
The Great Barrier Reef (Earth's Incredible Places)
by Helen Scales
- Price$17.83
- Rating4.8
- Reviews27
-
What the Wild Sea Can Be: Shortlisted for the Women's Prize for Nonfiction
by Helen Scales
- Price-
- Rating4.7
- Reviews45
-
The Brilliant Abyss: Exploring the Majestic Hidden Life of the Deep Ocean, and the Looming Threat That Imperils It
by Helen Scales
- Price$10.82
- Rating4.4
- Reviews383
-
Spirals in Time: The Secret Life and Curious Afterlife of Seashells
by Helen Scales
- Price$17.51
- Rating4.5
- Reviews352
-
What the Wild Sea Can Be: The Future of the World’s Ocean
by Helen Scales
- Price$9.99
- Rating4.7
- Reviews45
-
Shell Day: A Story of 24 Hours and 24 Molluscan Lives (Earth Day)
by Helen Scales
- Price$18
- Rating5.0
- Reviews1
-
Shell Day: A Story of 24 Hours and 24 Molluscan Lives
by Helen Scales
- Price$7.99
- Rating5.0
- Reviews1
-
The Shell-spotter’s Guide (National Trust)
by Helen Scales
- Price$16.14
- Rating4.5
- Reviews124
-
What the Wild Sea Can Be: The Future of the World’s Ocean
by Helen Scales
- Price$11.97
- Rating4.7
- Reviews45
Main categories
FAQ
How many books does Helen Scales have on Amazon?
KDPTop tracks 16 of their books; 14 made an Amazon list in the last 30 days.
Which categories does Helen Scales publish in?
Their books chart most often in Marine Life, Seashells, Marine Biology.
How does Helen Scales price their books?
The median price is $13.96; half of the books cost $10.41–$17.67.
Has Helen Scales released new books recently?
1 new book in the last 30 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.