KDP categories · Top KDP authors
Margaret Brum: Amazon KDP author data
As of Nov 6, 2026, Margaret Brum has 105 books on Amazon, 24 of them on a best-seller list in the last 30 days (best rank #13), mostly in Anatomy & Physiology, Biology, Earth Sciences.
| Median price | $8.99 |
|---|---|
| Price range (middle 50%) | $7.99 – $12.99 |
| Median reviews | 1 |
| Total reviews | 35 |
| New books (30 days) | 12 |
| Breakout books (30 days) | 3 |
What stands out
- Median price $8.99, 80% above the median of their main category, Anatomy & Physiology.
- 12 new books in the last 30 days, 3 of them broke into a Best Sellers list.
Margaret Brum's best-ranked books
-
Dangerous Plants - Poison, Traps, Thorns, and Survival: How Plants Hunt, Protect Themselves, and Survive (What, How, Why — Big Questions for Curious Minds)
by Margaret Brum
- Price$7.99
- Rating5.0
- Reviews1
-
What Happened to the Dinosaurs? A Story From Long Ago: The Real Story of Extinction, Fossils, and the World Before Humans - A Science Book for Curious ... How, Why — Big Questions for Curious Minds)
by Margaret Brum
- Price$7.99
- Rating5.0
- Reviews2
- Published2026-03
-
What Is Lightning? - Electricity in the Sky: A Children’s Guide to Electricity, Storms, Thunder, and How Lightning Forms - Science Book for Curious ... - How the Most Powerful Forces on Earth Work)
by Margaret Brum
- Price$12.99
- Rating5.0
- Reviews4
-
What Is a Tornado? The Wind That Spins: A Kid’s Guide to Twisting Storms, Powerful Winds, Weather Science, and Staying Safe (Extreme Nature Series - How the Most Powerful Forces on Earth Work)
by Margaret Brum
- Price$7.99
- Rating5.0
- Reviews2
- Published2026-03
-
What Is a Tsunami? - Waves That Move the Ocean: A Simple Science Book for Kids About How Tsunamis Form and Move Across the Ocean 5-9 (Extreme Nature ... How the Most Powerful Forces on Earth Work)
by Margaret Brum
- Price$7.99
- Rating5.0
- Reviews1
- Published2026-05
-
What Is Matter? How Heat Changes Everything Around You: Solids, Liquids, and Gases for Curious Kids (What, How, Why — Big Questions for Curious Minds)
by Margaret Brum
- Price$7.99
- Reviews-
- Published2026-04
-
How Weather Works: Storms, Clouds, Wind, and Sky (Extreme Nature Series - How the Most Powerful Forces on Earth Work)
by Margaret Brum
- Price$7.99
- Rating5.0
- Reviews1
- Published2026-06
-
What Is a Volcano? Fire Inside The Earth: A Kids Guide to Volcanoes, Lava, Eruptions, and the Powerful Forces Inside the Earth (Extreme Nature Series - How the Most Powerful Forces on Earth Work)
by Margaret Brum
- Price$7.99
- Rating5.0
- Reviews2
-
How Rocks Are Made - Fire, Pressure, and Time: A Children’s Guide to Rocks, Crystals, Volcanoes, Fossils, and Earth’s Hidden World (What, How, Why — Big Questions for Curious Minds)
by Margaret Brum
- Price$8.99
- Rating3.3
- Reviews3
-
What Fossils Tell Us: Life Before Humans - A Clear Guide to Ancient Creatures, Fossils, and Earth’s Past (What, How, Why — Big Questions for Curious Minds)
by Margaret Brum
- Price$11.21
- Reviews-
Main categories
FAQ
How many books does Margaret Brum have on Amazon?
KDPTop tracks 105 of their books; 24 made an Amazon list in the last 30 days.
Which categories does Margaret Brum publish in?
Their books chart most often in Anatomy & Physiology, Biology, Earth Sciences.
How does Margaret Brum price their books?
The median price is $8.99; half of the books cost $7.99–$12.99.
Has Margaret Brum released new books recently?
12 new books in the last 30 days, 3 of which reached a Best Sellers list.
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.