KDP categories · Top KDP authors
Ruth Spiro: Amazon KDP author data
As of Nov 6, 2026, Ruth Spiro has 23 books on Amazon, 23 of them on a best-seller list in the last 30 days (best rank #4), mostly in Programming, Government, Hardware & Robotics.
| Median price | $8.67 |
|---|---|
| Price range (middle 50%) | $7.50 – $9.49 |
| Median reviews | 88 |
| Total reviews | 5,160 |
| New listings (30 days, incl. new editions) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 100% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $8.67, 33% below the median of their main category, Programming.
Ruth Spiro's best-ranked books
-
Baby Loves Coding! (Baby Loves Science)
by Ruth Spiro
- Price$6.99
- Rating4.6
- Reviews1,088
-
Baby Loves Robotics! (Baby Loves Science)
by Ruth Spiro
- Price$7.50
- Rating5.0
- Reviews2
-
Baby Loves Electrical Engineering on Christmas! (Baby Loves Science)
by Ruth Spiro
- Price$5.20
- Rating4.8
- Reviews151
- Published2021-08
-
Baby Loves Gravity! (Baby Loves Science)
by Ruth Spiro
- Price$8.99
- Rating4.8
- Reviews456
-
How to Explain Coding to a Grown-Up (How to Explain Science to a Grown-Up)
by Ruth Spiro
- Price$10.89
- Rating5.0
- Reviews10
-
Baby Loves Political Science: Democracy! (Baby Loves Science)
by Ruth Spiro
- Price$8.99
- Rating4.8
- Reviews204
-
How to Explain Robotics to a Grown-Up (How to Explain Science to a Grown-Up)
by Ruth Spiro
- Price$14.91
- Rating5.0
- Reviews4
-
Baby Loves Photosynthesis on St. Patrick's Day! (Baby Loves Science)
by Ruth Spiro
- Price$5.40
- Rating4.7
- Reviews101
-
Baby Loves Science Board Boxed Set
by Ruth Spiro
- Price$23.86
- Rating4.8
- Reviews801
-
One Small Spark: A Tikkun Olam Story
by Ruth Spiro
- Price$13.47
- Rating4.7
- Reviews18
Main categories
FAQ
How many books does Ruth Spiro have on Amazon?
KDPTop tracks 23 of their books; 23 made an Amazon list in the last 30 days.
Which categories does Ruth Spiro publish in?
Their books chart most often in Programming, Government, Hardware & Robotics.
How does Ruth Spiro price their books?
The median price is $8.67; half of the books cost $7.50–$9.49.
Has Ruth Spiro released new books recently?
0 new books 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.