| Category name | Best seller rank | 50th book's rank | Median sales($) | Median price ($) | Volatility (%) | New releases (%) | Self pub.(%) | KDP Select (%) | Competition |
|---|---|---|---|---|---|---|---|---|---|
| Books > Engineering & Transportation > Engineering > Mechanical > Hydraulics | 15,115 | 734,655 | $1,377 | |
90% | 0% | 20% | 7% | ~ 8,000 |
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