| Category name | Best seller rank | 50th book's rank | Median sales($) | Median price ($) | Volatility (%) | New releases (%) | Self pub.(%) | KDP Select (%) | Competition |
|---|---|---|---|---|---|---|---|---|---|
| Arts & Photography > Music > Musical Genres > Heavy Metal | 7,155 | 59,454 | $4,813 | |
100% | 25% | 0% | 7% | ~ 1,000 |
| Children's Books > Science, Nature & How It Works > Heavy Machinery | 3,523 | 71,965 | $1,995 | |
100% | 0% | 15% | 0% | ~ 2,000 |
| Arts & Photography > Music > Biographies > Heavy Metal | 7,368 | 137,199 | $4,757 | |
100% | 20% | 5% | 0% | ~ 575 |
| Books > Engineering & Transportation > Engineering > Mechanical > Machinery | 10,793 | 207,314 | $410 | |
95% | 0% | 20% | 3% | ~ 6,000 |
| Books > Teens > Education & Reference > Science & Technology > Technology > Machinery & Tools | 1,031 | 3,799,162 | $0 | |
95% | 0% | 15% | 7% | ~ 131 |
| Books > Engineering & Transportation > Engineering > Electrical & Electronics > Electric Machinery & Motors | 15,355 | 5,806,945 | $1,135 | |
90% | 10% | 35% | 10% | ~ 2,000 |
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