| Category name | Best seller rank | 50th book's rank | Median sales($) | Median price ($) | Volatility (%) | New releases (%) | Self pub.(%) | KDP Select (%) | Competition |
|---|---|---|---|---|---|---|---|---|---|
| Books > Textbooks > Medicine & Health Sciences > Medicine > Clinical > Surgery > Neurosurgery | 228,536 | 917,436 | $0 | |
100% | 0% | 10% | 0% | ~ 2,000 |
| Books > Medical Books > Medicine > Surgery > Neurosurgery | 20,411 | 955,825 | $1,145 | |
100% | 10% | 25% | 3% | ~ 3,000 |
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