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Harry Langer: Amazon KDP author data
Harry Langer has 31 books on Amazon, 30 of them on a best-seller list in the last 30 days (best rank #6), mostly in Electrical & Electronics, Electronics, Transistors.
31Books on Amazon
30Listed in 30 days
3.9Average rating
| Median price | $6.99 |
|---|---|
| Price range (middle 50%) | $4.99 – $12.99 |
| Median reviews | 3 |
| Total reviews | 23 |
| New books (30 days) | 19 |
| Breakout books (30 days) | 11 |
What stands out
- 97% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $6.99, 71% below the median of their main category, Electrical & Electronics.
- 19 new books in the last 30 days, 11 of them broke into a Best Sellers list.
Harry Langer's best-ranked books
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Celestial Mechanics - 300 Problems and Solutions: In Gravitational Dynamics and Orbital Motion (numerical problems in physics)
by Harry Langer
- Price$6.99
- Reviews-
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Challenging Problems in Physics - Electronics Part 2 - 300 Numerical Problems: In Electronic Circuits, Amplifiers and Digital Electronics (numerical problems in physics)
by Harry Langer
- Price$5.99
- Reviews-
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300 Numerical Problems in Physics - Electronics Part 1 - Semiconductor Physics and Electronic Devices: A Complete Worked Problem Course from Ohm's Law to Thermal Design
by Harry Langer
- Price$6.99
- Reviews-
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300 Numerical Problems in Physics - Electronics Part 1 - Semiconductor Physics and Electronic Devices: A Complete Worked Problem Course from Ohm's Law to Thermal Design
by Harry Langer
- Price$15.99
- Reviews-
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Elaborate Quiz Book on Mechanical Engineering - 1100 Q&A: A powerful tool for self study and revision (Engineering Books 1)
by Harry Langer
- Price$4.99
- Rating4.4
- Reviews3
- Published2025-11
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Physics of Fluid Mechanics - 300 Solved Problems in Statics, Dynamics, and Flow Analysis: A Problems & Solutions Guide for Physics and Engineering Students (numerical problems in physics)
by Harry Langer
- Price$6.99
- Reviews-
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Challenging Problems in Physics - Electronics Part 2 - 300 Numerical Problems: In Electronic Circuits, Amplifiers and Digital Electronics (numerical problems in physics)
by Harry Langer
- Price$13.99
- Reviews-
-
Quiz Book on Metals & Metallurgy: A Learning Companion for Students and Science Enthusiasts (Engineering Books 4)
by Harry Langer
- Price$4.99
- Rating5.0
- Reviews4
-
Advanced Thermodynamics Problems - 300 Challenging Numerical Questions with Detailed Solutions (numerical problems in physics)
by Harry Langer
- Price$5.99
- Reviews-
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Powerful Quiz Book on Electrical Engineering - 1000 Q&A: Essential Knowledge for Students and Professionals (Engineering Books 7)
by Harry Langer
- Price$4.99
- Rating4.0
- Reviews1
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.