KDP categories · Top KDP authors
Rob J. Hayes: Amazon KDP author data
As of Nov 6, 2026, Rob J. Hayes has 17 books on Amazon, 4 of them on a best-seller list in the last 30 days (best rank #19), mostly in Classics, Space Opera, Science Fiction & Fantasy.
| Median price | $5.99 |
|---|---|
| Price range (middle 50%) | $4.99 – $5.99 |
| Median reviews | 489 |
| Total reviews | 9,939 |
| New listings (30 days, incl. new editions) | 2 |
| Breakout books (30 days) | 1 |
Rob J. Hayes's best-ranked books
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Blight Wardens (Titan Hoppers Book 5)
by Rob J. Hayes
- Price$5.99
- Rating4.6
- Reviews211
-
Titan Hoppers: Epic Coming of Age Fantasy... IN SPACE!
by Rob J. Hayes
- Price$4.99
- Rating4.4
- Reviews1,080
-
Herald: (Age of the GodEater - book 1) (The GodEater Saga)
by Rob J. Hayes
- Price$4.99
- Rating4.5
- Reviews557
-
The Heresy Within: A Grimdark Epic Fantasy Novel (First Earth Saga Book 1)
by Rob J. Hayes
- Price$3.99
- Rating4.3
- Reviews1,471
-
Never Die: Epic Sword & Sorcery (The Mortal Techniques)
by Rob J. Hayes
- Price$4.99
- Rating4.2
- Reviews1,370
-
Titan Hoppers: Titan Hoppers, Book 1
by Rob J. Hayes
- Price$0
- Rating4.4
- Reviews1,079
-
The Colour of Vengeance: The Ties that Bind book 2 (First Earth Saga)
by Rob J. Hayes
- Price$5.99
- Rating4.4
- Reviews936
-
The Price of Faith: The Ties that Bind book 3 (First Earth Saga)
by Rob J. Hayes
- Price$5.99
- Rating4.4
- Reviews923
-
Pawn's Gambit (The Mortal Techniques)
by Rob J. Hayes
- Price$13.99
- Rating4.5
- Reviews494
-
Where Loyalties Lie: Best Laid Plans book 1 (First Earth Saga 4)
by Rob J. Hayes
- Price$4.99
- Rating4.2
- Reviews484
Main categories
FAQ
How many books does Rob J. Hayes have on Amazon?
KDPTop tracks 17 of their books; 4 made an Amazon list in the last 30 days.
Which categories does Rob J. Hayes publish in?
Their books chart most often in Classics, Space Opera, Science Fiction & Fantasy.
How does Rob J. Hayes price their books?
The median price is $5.99; half of the books cost $4.99–$5.99.
Has Rob J. Hayes released new books recently?
2 new books in the last 30 days, 1 of which reached a Best Sellers list.
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.