| Category name | Best seller rank | 50th book's rank | Median sales($) | Median price ($) | Volatility (%) | New releases (%) | Self pub.(%) | KDP Select (%) | Competition |
|---|---|---|---|---|---|---|---|---|---|
| Books > Children's Books > Science, Nature & How It Works > Inventions & Inventors | 431 | 142,800 | £764 | |
95% | 10% | 5% | 0% | ~ 1,000 |
| Books > Young Adult > Science & Technology > Technology > Inventions | 5,206 | 322,304 | £205 | |
95% | 0% | 10% | 0% | ~ 381 |
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