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Robert Keller: Amazon KDP author data
Robert Keller has 129 books on Amazon, 91 of them on a best-seller list in the last 30 days (best rank #3), mostly in Mass Murder, Serial Killers, Criminals.
129Books on Amazon
91Listed in 30 days
4.3Average rating
| Median price | $3.99 |
|---|---|
| Price range (middle 50%) | $3.99 – $3.99 |
| Median reviews | 407 |
| Total reviews | 58,917 |
| New books (30 days) | 4 |
| Breakout books (30 days) | 4 |
What stands out
- 71% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- 4 new books in the last 30 days, 4 of them broke into a Best Sellers list.
Robert Keller's best-ranked books
-
Murder Most Vile Volume 57: 18 Shocking True Crime Cases of Murder and Mayhem
by Robert Keller
- Price$3.99
- Rating4.6
- Reviews79
-
Cold Cases Solved Volume 16: 18 Fascinating True Crime Cold Cases, Finally Solved (Cold Cases: Solved)
by Robert Keller
- Price$3.99
- Rating4.4
- Reviews153
-
Deadly Women Volume 23: 20 Shocking True Crime Cases of Women Who Kill
by Robert Keller
- Price$3.99
- Rating4.4
- Reviews204
-
Murder Most Vile Volume 56: 18 Shocking True Crime Cases of Murder and Mayhem
by Robert Keller
- Price$3.99
- Rating4.4
- Reviews243
-
Murder Most Vile Vol 1, 2, & 3 Boxset: 54 Shocking True Crime Cases of Murder and Mayhem (Murder Most Vile Boxsets)
by Robert Keller
- Price$7.99
- Rating4.7
- Reviews22
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Murder Most Vile Volume 1: 18 Shocking True Crime Cases of Murder and Mayhem
by Robert Keller
- Price$3.99
- Rating4.4
- Reviews745
-
Murder Most Vile Volume 55: 18 Shocking True Crime Cases of Murder and Mayhem
by Robert Keller
- Price$3.99
- Rating4.4
- Reviews311
-
Deadly Women Volume 1: 18 Shocking True Crime Cases of Women Who Kill
by Robert Keller
- Price$3.99
- Rating4.2
- Reviews604
-
Deadly Women Volume 20 : 20 Shocking True Crime Cases of Women Who Kill
by Robert Keller
- Price$3.99
- Rating4.5
- Reviews389
- Published2025-08
-
Murder Most Vile Volume 2: 18 Shocking True Crime Cases of Murder and Mayhem
by Robert Keller
- Price$3.99
- Rating4.4
- Reviews544
Main categories
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.