KDP categories · Top KDP authors
Passbooks: Amazon KDP author data
As of Nov 6, 2026, Passbooks has 71 books on Amazon, 62 of them on a best-seller list in the last 30 days (best rank #5), mostly in Civil Service, Study & Test-Taking Skills, CLEP.
| Median price | $39.95 |
|---|---|
| Price range (middle 50%) | $39.95 – $49.95 |
| Median reviews | 2 |
| Total reviews | 197 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 87% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $39.95, 54% above the median of their main category, Civil Service.
Passbooks's best-ranked books
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Electrician's Helper (Career Examination)
by Passbooks
- Price$39.95
- Rating5.0
- Reviews1
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Office Assistant (Career Examination)
by Passbooks
- Price$34.95
- Rating5.0
- Reviews3
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Bridge & Tunnel Maintainer (Career Examination)
by Passbooks
- Price$39.95
- Rating3.0
- Reviews1
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Administrative Officer I (Career Examination)
by Passbooks
- Price$49.95
- Reviews-
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Information Systems (College Level Examination Program)
by Passbooks
- Price$23.71
- Reviews-
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Steamfitters' Apprentice Aptitude Test
by Passbooks
- Price$49.95
- Rating4.0
- Reviews5
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Watch, Guard and Patrol License (Career Examination)
by Passbooks
- Price$39.95
- Rating3.5
- Reviews3
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Principal Administrative Associate (Career Examination)
by Passbooks
- Price$49.95
- Rating5.0
- Reviews1
Main categories
FAQ
How many books does Passbooks have on Amazon?
KDPTop tracks 71 of their books; 62 made an Amazon list in the last 30 days.
Which categories does Passbooks publish in?
Their books chart most often in Civil Service, Study & Test-Taking Skills, CLEP.
How does Passbooks price their books?
The median price is $39.95; half of the books cost $39.95–$49.95.
Has Passbooks released new books recently?
0 new books in the last 30 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.