KDP categories · Top KDP authors
Michael Guillen: Amazon KDP author data
As of Nov 6, 2026, Michael Guillen has 9 books on Amazon, 9 of them on a best-seller list in the last 30 days (best rank #13), mostly in Science & Religion, Astronomy & Space Science, Experiments & Projects.
| Median price | $12.32 |
|---|---|
| Price range (middle 50%) | $9.99 – $17.19 |
| Median reviews | 468 |
| Total reviews | 4,662 |
| New listings (30 days, incl. new editions) | 1 |
| Breakout books (30 days) | 0 |
What stands out
- 100% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $12.32, 23% above the median of their main category, Science & Religion.
Michael Guillen's best-ranked books
-
Five Equations That Changed the World: The Power and Poetry of Mathematics
by Michael Guillen
- Price$2.99
- Rating4.5
- Reviews256
-
Believing Is Seeing: A Physicist Explains How Science Shattered His Atheism and Revealed the Necessity of Faith
by Michael Guillen
- Price$17.28
- Rating4.6
- Reviews1,319
- Published2021-09
-
Amazing Truths: How Science and the Bible Agree
by Michael Guillen
- Price$11.51
- Rating4.6
- Reviews682
-
Believing Is Seeing: A Physicist Explains How Science Shattered His Atheism and Revealed the Necessity of Faith
by Michael Guillen
- Price$12.32
- Rating4.6
- Reviews1,319
-
The End of Life as We Know It: Ominous News From the Frontiers of Science
by Michael Guillen
- Price$9.95
- Rating4.5
- Reviews75
-
Amazing Truths: How Science and the Bible Agree
by Michael Guillen
- Price$7.49
- Rating4.6
- Reviews682
-
The End of Life as We Know It: Ominous News from the Frontiers of Science
by Michael Guillen
- Price$17.19
- Rating4.5
- Reviews75
-
Five Equations that Changed the World: The Power and Poetry of Mathematics
by Michael Guillen
- Price$14.09
- Rating4.5
- Reviews255
- Published1996-09
-
Picture-Perfect Christmas
by Michael Guillen
- Price$24.53
- Reviews-
Main categories
FAQ
How many books does Michael Guillen have on Amazon?
KDPTop tracks 9 of their books; 9 made an Amazon list in the last 30 days.
Which categories does Michael Guillen publish in?
Their books chart most often in Science & Religion, Astronomy & Space Science, Experiments & Projects.
How does Michael Guillen price their books?
The median price is $12.32; half of the books cost $9.99–$17.19.
Has Michael Guillen 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.