KDP categories · Top KDP authors
Lawrence S. Leff M.S.: Amazon KDP author data
As of Nov 6, 2026, Lawrence S. Leff M.S. has 8 books on Amazon, 7 of them on a best-seller list in the last 30 days (best rank #5), mostly in Mathematics, Science & Mathematics, SAT.
| Median price | $17.01 |
|---|---|
| Price range (middle 50%) | $12.96 – $20.68 |
| Median reviews | 232 |
| Total reviews | 2,125 |
| New listings (30 days, incl. new editions) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 88% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $17.01, 22% above the median of their main category, Mathematics.
Lawrence S. Leff M.S.'s best-ranked books
-
Barron's Math 360: A Complete Study Guide to Pre-Calculus with Online Practice (Barron's Test Prep)
by Lawrence S. Leff M.S.
- Price$22.32
- Rating4.6
- Reviews319
-
SAT Math Workbook: Up-to-Date Practice for the Digital Exam (Barron's SAT Prep)
by Lawrence S. Leff M.S.
- Price$23.12
- Rating4.6
- Reviews540
-
Barron's Math 360: A Complete Study Guide to Pre-Calculus with Online Practice (Barron's Test Prep)
by Lawrence S. Leff M.S.
- Price$11.99
- Rating4.6
- Reviews319
-
Barron's Math 360: A Complete Study Guide to Geometry with Online Practice (Barron's Test Prep)
by Lawrence S. Leff M.S.
- Price$17
- Rating4.4
- Reviews58
-
Barron's Math 360: A Complete Study Guide to Geometry with Online Practice (Barron's Test Prep)
by Lawrence S. Leff M.S.
- Price$11.99
- Rating4.4
- Reviews58
-
Barron's Math Workbook for the NEW SAT
by Lawrence S. Leff M.S.
- Price$20.13
- Rating4.6
- Reviews145
-
E-Z Geometry (Barron's Easy Way)
by Lawrence S. Leff M.S.
- Price$17.02
- Rating4.2
- Reviews146
-
SAT Math Workbook (Barron's SAT Prep)
by Lawrence S. Leff M.S.
- Price$13.28
- Rating4.6
- Reviews540
- Published2019-02
Main categories
FAQ
How many books does Lawrence S. Leff M.S. have on Amazon?
KDPTop tracks 8 of their books; 7 made an Amazon list in the last 30 days.
Which categories does Lawrence S. Leff M.S. publish in?
Their books chart most often in Mathematics, Science & Mathematics, SAT.
How does Lawrence S. Leff M.S. price their books?
The median price is $17.01; half of the books cost $12.96–$20.68.
Has Lawrence S. Leff M.S. 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.