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Ummer: Amazon KDP author data
As of Nov 6, 2026, Ummer has 5 books on Amazon, 4 of them on a best-seller list in the last 30 days (best rank #11), mostly in Percussion, Music, Instruments.
| Median price | $4.99 |
|---|---|
| Price range (middle 50%) | $4.99 – $19.99 |
| Median reviews | 33 |
| Total reviews | 100 |
| New books (30 days) | 4 |
| Breakout books (30 days) | 3 |
What stands out
- 80% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $4.99, 69% below the median of their main category, Percussion.
- 4 new books in the last 30 days, 3 of them broke into a Best Sellers list.
Ummer's best-ranked books
-
Dr. Ummer's Official Drum Encyclopedia: Dictionary & Thesaurus - Every Maker, Every Term, and How They All Connect
by Ummer
- Price$4.99
- Reviews-
- Published2026-08
-
A Comprehensive History of the Drum Kit: The Complete Story, from First Beat to Modern Kit
by Ummer
- Price$0.99
- Rating4.8
- Reviews33
- Published2026-08
-
A Comprehensive History of the Drum Kit: The Complete Story, from First Beat to Modern Kit
by Ummer
- Price$19.99
- Rating4.8
- Reviews33
-
A Comprehensive History of the Drum Kit: The Complete Story, from First Beat to Modern Kit
by Ummer
- Price$24.99
- Rating4.8
- Reviews34
- Published2026-08
-
The Greatest Drummers of All Time: The Players Who Shaped the Instrument
by Ummer
- Price$4.99
- Reviews-
Main categories
FAQ
How many books does Ummer have on Amazon?
KDPTop tracks 5 of their books; 4 made an Amazon list in the last 30 days.
Which categories does Ummer publish in?
Their books chart most often in Percussion, Music, Instruments.
How does Ummer price their books?
The median price is $4.99; half of the books cost $4.99–$19.99.
Has Ummer released new books recently?
4 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.