KDP categories · Top KDP authors
Seashells (Oceans & Seas, Books): Amazon KDP category data
Amazon Books Best Sellers data for Seashells (Oceans & Seas, Books), updated Nov 2, 2026: median price $12.99, median 34 reviews, average rating 4.5 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $8.99 – $19.07 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 7% of the parent category Oceans & Seas (472), one of the easier corners under it.
Top 10 Seashells best sellers
-
Florida's Seashells: A Beachcomber's Guide
by Blair Witherington
- List rank#1
- Price$9.27
- Rating4.8
- Reviews1,608
-
The Wonder of Seashells: Discover the Meaning & Magic of the Ocean’s Treasures (Ocean Wonders)
by Melissa Hobson
- List rank#2
- Price$14.43
- Rating4.7
- Reviews87
-
Seashells: A Compendium of Five Thousand of the World's Species
by Paul Callomon
- List rank#3
- Price$44.56
- Rating4.1
- Reviews12
-
Florida's Living Beaches: A Guide for the Curious Beachcomber
by Blair Witherington
- List rank#4
- Price$14.99
- Rating4.9
- Reviews1,090
-
Peterson First Guide To Shells Of North America: The Beginning Naturalist's Companion from the Famous Peterson Field Series
- List rank#5
- Price$9.59
- Rating4.5
- Reviews162
-
Pocket Guide to Hawaii’s Seashells
by Keoki and Yuko Stender
- List rank#6
- Price$14.95
- Rating5.0
- Reviews2
-
Shells of Florida-Gulf of Mexico: A Beachcomber’s Guide to Coastal Areas
by Jeanne L. Murphy and Brian W. Lane
- List rank#7
- Price$8.95
- Rating4.8
- Reviews452
-
The Beachcomber's Companion: An Illustrated Guide to Collecting and Identifying Beach Treasures
by Anna Marlis Burgard
- List rank#8
- Price$14.51
- Rating4.7
- Reviews638
-
Seashells of Georgia and the Carolinas
by Blair Witherington
- List rank#9
- Price$12.07
- Rating4.8
- Reviews496
-
The Seashore Sticker Anthology: With More Than 1,000 Vintage Stickers
by DK
- List rank#10
- Price$23.29
- Rating4.6
- Reviews214
Same niche in Kindle eBooks: Seashells
FAQ
Is Seashells a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 34 reviews and sells for $12.99.
How many reviews do you need to rank in Seashells?
The median best seller has 34 reviews, and 70% of them have fewer than 100.
What do Seashells best sellers cost?
The median price is $12.99; half of the best sellers are priced between $8.99 and $19.07.
Can new books break into Seashells?
6% of the current best sellers were released in the last 90 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.