| Category name | Best seller rank | 50th book's rank | Median sales($) | Median price ($) | Volatility (%) | New releases (%) | Self pub.(%) | KDP Select (%) | Competition |
|---|---|---|---|---|---|---|---|---|---|
| Kindle eBooks > Science & Math > Physics > Mechanics | 61,833 | 551,310 | $279 | |
100% | 5% | 40% | 37% | ~ 2,000 |
| Kindle eBooks > Science & Math > Physics > Waves & Wave Mechanics | 16,364 | 663,397 | $181 | |
95% | 20% | 55% | 47% | ~ 503 |
| Kindle eBooks > Engineering & Transportation > Engineering > Mechanical > Fracture Mechanics | 455,601 | 4,034,042 | $0 | |
100% | 5% | 75% | 33% | ~ 195 |
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