KDP categories · Top KDP authors
Robert J. Crane: Amazon KDP author data
As of Nov 6, 2026, Robert J. Crane has 51 books on Amazon, 32 of them on a best-seller list in the last 30 days (best rank #8), mostly in Science Fiction, Superheroes, Superhero.
| Median price | $4.99 |
|---|---|
| Price range (middle 50%) | $4.99 – $4.99 |
| Median reviews | 3,516 |
| Total reviews | 262,448 |
| New books (30 days) | 1 |
| Breakout books (30 days) | 0 |
What stands out
- 63% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
Robert J. Crane's best-ranked books
-
Meltdown (The Girl in the Box Book 41)
by Robert J. Crane
- Price$4.99
- Rating4.6
- Reviews2,327
-
Enemies (The Girl in the Box Book 7)
by Robert J. Crane
- Price$4.99
- Rating4.6
- Reviews8,369
-
Family (The Girl in the Box Book 4)
by Robert J. Crane
- Price$4.99
- Rating4.6
- Reviews12,142
-
Ruthless: Out of the Box (The Girl in the Box Book 13)
by Robert J. Crane
- Price$4.99
- Rating4.6
- Reviews3,531
-
Untouched (The Girl in the Box Book 2)
by Robert J. Crane
- Price$4.99
- Rating4.4
- Reviews7,045
-
Broken (The Girl in the Box Book 6)
by Robert J. Crane
- Price$3.99
- Rating4.5
- Reviews9,106
-
Legacy (The Girl in the Box Book 8)
by Robert J. Crane
- Price$4.99
- Rating4.6
- Reviews7,651
-
Power (The Girl in the Box Book 10)
by Robert J. Crane
- Price$4.99
- Rating4.6
- Reviews7,635
-
Driven (The Girl in the Box Book 30)
by Robert J. Crane
- Price$4.99
- Rating4.6
- Reviews2,500
-
Soulless (The Girl in the Box Book 3)
by Robert J. Crane
- Price$4.99
- Rating4.5
- Reviews5,513
Main categories
FAQ
How many books does Robert J. Crane have on Amazon?
KDPTop tracks 51 of their books; 32 made an Amazon list in the last 30 days.
Which categories does Robert J. Crane publish in?
Their books chart most often in Science Fiction, Superheroes, Superhero.
How does Robert J. Crane price their books?
The median price is $4.99; half of the books cost $4.99–$4.99.
Has Robert J. Crane released new books recently?
1 new book 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.