KDP categories · Top KDP authors
Mars: Amazon KDP category data
Amazon Books Best Sellers data for Mars, updated Nov 3, 2026: median price $18.59, median 110 reviews, average rating 4.5 and a KDPTop opportunity score of 24/100 (highly competitive).
| Price range (middle 50%) | $14.24 – $25.22 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 9% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 6% of the parent category Astronomy & Space Science (1,911), one of the easier corners under it.
Top 10 Mars best sellers
-
Take Me to Your Leader: Perspectives on Your First Alien Encounter
- List rank#1
- Price$12.09
- Rating4.4
- Reviews1,467
-
-
Cydonia: The Secret Chronicles of Mars
by David E. Flynn
- List rank#3
- Price$22.33
- Rating4.6
- Reviews112
-
Packing for Mars: The Curious Science of Life in the Void
by Mary Roach
- List rank#4
- Price$17.96
- Rating4.5
- Reviews2,194
-
-
Cosmos: Explore the Wonders of the Universe (DK Secret World Encyclopedias)
by DK
- List rank#6
- Price$25.89
- Rating4.7
- Reviews281
-
100 Things to See in the Night Sky, Expanded Edition: Your Illustrated Guide to the Planets, Satellites, Constellations, and More
by Dean Regas
- List rank#7
- Price$12.81
- Rating4.8
- Reviews737
-
Nothing in This Book Is True, But It's Exactly How Things Are: The Secret History of the Earth, Merkaba Activation, and Breath Alchemy
by Bob Frissell
- List rank#8
- Price$19.76
- Rating4.6
- Reviews555
-
Merlin's Tour of the Universe, Revised and Updated for the Twenty-First Century: A Traveler's Guide to Blue Moons and Black Holes, Mars, Stars, and Everything Far
- List rank#9
- Price$19.17
- Rating4.6
- Reviews795
-
Lab Girl: A Memoir
by Hope Jahren
- List rank#10
- Price$8.54
- Rating4.4
- Reviews9,958
FAQ
Is Mars a good niche for Amazon KDP?
Its KDPTop opportunity score is 24/100, which makes it highly competitive. The median best seller has 110 reviews and sells for $18.59.
How many reviews do you need to rank in Mars?
The median best seller has 110 reviews, and 47% of them have fewer than 100.
What do Mars best sellers cost?
The median price is $18.59; half of the best sellers are priced between $14.24 and $25.22.
Can new books break into Mars?
9% 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.