You won't believe it because I don't believe it.
Three weeks ago I put up my book Commerce on the Scribd.com website. It got 55 purchases in the first 24 hours. Now it has 116 purchases at $2.00 of which I get 80%.
Other books are $1.00 and a few are $3.00.
I was so shocked that I had the rest of my books (excluding Marketing Without Advertising) digitized and I put them up online too.
After one day, my other nine books have sold nearly 100 copies. Here is the site of my books for sale for reading online or downloading.