| Category name | Best seller rank | 50th book's rank | Median sales($) | Median price ($) | Volatility (%) | New releases (%) | Self pub.(%) | KDP Select (%) | Competition |
|---|---|---|---|---|---|---|---|---|---|
| Books > Science & Nature > Engineering & Technology > Electronics & Communications Engineering > Telephone & Wireless Technology | 4,813 | 158,736 | £321 | |
95% | 5% | 50% | 10% | ~ 4,000 |
| Books > Computing & Internet > Networking & Security > Wireless | 19,934 | 581,371 | £348 | |
100% | 6% | 65% | 11% | ~ 1,000 |
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