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Tammy Harris: Amazon KDP author data
Tammy Harris has 40 books on Amazon, 27 of them on a best-seller list in the last 30 days (best rank #13), mostly in Hi-Lo, Reading & Phonics, Reading.
40Books on Amazon
27Listed in 30 days
4.6Average rating
| Median price | $4.49 |
|---|---|
| Price range (middle 50%) | $3.99 – $12.99 |
| Median reviews | 3 |
| Total reviews | 92 |
| New books (30 days) | 15 |
| Breakout books (30 days) | 7 |
What stands out
- 68% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $4.49, 60% below the median of their main category, Hi-Lo.
- 15 new books in the last 30 days, 7 of them broke into a Best Sellers list.
Tammy Harris's best-ranked books
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Orton-Gillingham Decodable Stories: Level 5: Kim Bakes a Cake (Level 5 Orton-Gillingham Decodable Stories Book 3)
by Tammy Harris
- Price$2.99
- Rating3.3
- Reviews3
-
Orton-Gillingham Decodable Stories: Level 6: The School Trip (Level 6 Orton-Gillingham Decodable Stories Book 1)
by Tammy Harris
- Price$3.99
- Rating5.0
- Reviews3
- Published2026-06
-
Orton-Gillingham Decodable Stories – Level 2 – Ben And His Pup : Structured Literacy Decodable Reader (level 2 orton-gillingham decodable stories)
by Tammy Harris
- Price$2.99
- Rating4.0
- Reviews2
-
Orton-Gillingham Decodable Stories – Level 2 – The Pet: Structured Literacy Decodable Book (level 2 orton-gillingham decodable stories 1)
by Tammy Harris
- Price$4.99
- Rating5.0
- Reviews7
-
Orton-Gillingham Decodable Stories – Level 4 – The Frog Who Missed the Bug: Structured Literacy Decodable Reader for Developing Readers (Level 4 Orton-Gillingham Decodable Stories)
by Tammy Harris
- Price$10.99
- Rating4.5
- Reviews9
-
Orton-Gillingham Decodable Stories – Level 3 – The Fly: Structured Literacy Decodable Reader for Developing Readers (level 3 orton-gillingham decodable stories Book 1)
by Tammy Harris
- Price$2.99
- Rating4.2
- Reviews5
-
Orton-Gillingham Decodable Stories - Level 4 – The Rabbit : Structured Literacy Decodable Reader for Developing Readers (Level 4 Orton-Gillingham Decodable Stories Book 3)
by Tammy Harris
- Price$3.99
- Rating4.5
- Reviews2
-
Orton-Gillingham Decodable Stories – Level 3 – The Swim Club: Structured Literacy Decodable Reader for Developing Readers (level 3 orton-gillingham decodable stories Book 2)
by Tammy Harris
- Price$3.99
- Rating3.5
- Reviews2
-
Orton-Gillingham Decodable Stories – Level 2 – The Pet: Structured Literacy Decodable Book (level 2 orton-gillingham decodable stories)
by Tammy Harris
- Price$12.99
- Rating5.0
- Reviews7
-
Orton-Gillingham Decodable Stories: Level 5 Jake and Dave Fly a Kite (Level 5 Orton-Gillingham Decodable Stories Book 2)
by Tammy Harris
- Price$2.99
- Rating4.6
- Reviews3
Main categories
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.