I wrote a few Kindle ebooks to see if I could make money at it.
CSS: an Overview for Developers
Backups: Avoiding Computer Disasters
Tips
If you see an ebook with 100% 5-star reviews, all glowing, they’re fake.
Likewise, you may not know it, but some good titles won’t have reviews at all. One of the better writers I read was a web developer in New Zealand, Paul Chubb, but he had no reviews when I read his book.