KDP categories · Top KDP authors
Ruby (Languages & Tools, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Ruby (Languages & Tools, Kindle eBooks), updated Nov 2, 2026: median price $9.99, median 6 reviews, average rating 4.3 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $30.98 |
|---|---|
| Average rating | 4.3 |
| New releases (90 days) | 4% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its review barrier is lower than in 87% of Kindle eBooks categories: the median best seller has only 6 reviews, so new books can chart with few.
- Its median reviews are 44% of the parent category Languages & Tools (14), one of the easier corners under it.
- Only 4% of its best sellers are under 90 days old, fewer than in 82% of Kindle eBooks categories: established titles hold the list.
Top 10 Ruby best sellers
-
97 Things Every Programmer Should Know: Collective Wisdom from the Experts
by Kevlin Henney
- List rank#1
- Price$15.55
- Rating4.1
- Reviews233
-
Ruby Programming: A Complete Guide to Mastering Basics And Advanced Concepts With Ease
by Julian Lornfeld
- List rank#2
- Price$9.99
- Rating5.0
- Reviews2
-
Metasploit, 2nd Edition
by David Kennedy
- List rank#3
- Price$35.99
- Rating4.8
- Reviews59
-
Ruby on Rails for Beginners: Build Database-Driven Web Apps with Clean, Practical Projects
by RION FROST
- List rank#4
- Price$2.99
- Reviews-
-
Rust in Action
by Tim McNamara
- List rank#5
- Price$49.99
- Rating4.7
- Reviews127
-
PowerShell for Beginners: The Complete Guide to Master Windows PowerShell Scripting
by Chase Clarke
- List rank#6
- Price$3.99
- Rating3.8
- Reviews127
-
High Performance PostgreSQL for Rails: Reliable, Scalable, Maintainable Database Applications
by Andrew Atkinson
- List rank#7
- Price$40.39
- Rating4.9
- Reviews13
-
Ruby Programming for Beginners: An Introduction to Learning Ruby Programming with Tutorials and Hands-On Examples
by Nathan Metzler
- List rank#8
- Price$3.99
- Rating4.4
- Reviews60
-
Polished Ruby Programming: Principles and practices for building scalable, maintainable, and performant software
by Jeremy Evans
- List rank#9
- Price$42.74
- Rating4.8
- Reviews8
-
Ruby on Rails Complete Web Dev Guide: 45 Real-World Projects to Build APIs, Dashboards, and Scalable Apps
by KNOWLES KIMPU
- List rank#10
- Price$4.99
- Reviews-
Same niche in Books: Ruby
FAQ
Is Ruby a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 6 reviews and sells for $9.99.
How many reviews do you need to rank in Ruby?
The median best seller has 6 reviews, and 91% of them have fewer than 100.
What do Ruby best sellers cost?
The median price is $9.99; half of the best sellers are priced between $4.99 and $30.98.
Can new books break into Ruby?
4% of the current best sellers were released in the last 90 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.