| Category name | Best seller rank | 50th book's rank | Median sales($) | Median price ($) | Volatility (%) | New releases (%) | Self pub.(%) | KDP Select (%) | Competition |
|---|---|---|---|---|---|---|---|---|---|
| Kindle eBooks > Engineering & Transportation > Engineering > Industrial, Manufacturing & Operational Systems > Machinery | 161,124 | 597,184 | $279 | |
100% | 10% | 47% | 43% | ~ 1,000 |
| Kindle eBooks > Children's eBooks > Science, Nature & How It Works > Heavy Machinery | 64,978 | 608,727 | $195 | |
100% | 5% | 20% | 43% | ~ 299 |
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