| 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 > Civil > Environmental > Hydrology | 237,073 | 1,246,558 | $0 | |
85% | 0% | 30% | 20% | ~ 1,000 |
| Kindle eBooks > Engineering & Transportation > Engineering > Civil > Hydrology | 140,271 | 2,771,110 | $0 | |
100% | 5% | 60% | 60% | ~ 346 |
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