As regular readers of this blog know, I am a free-lance science writer. I follow the sales of my books on Amazon.com. When Amazon deeply discounts my books, the sales go up. When they take the discounts off, sales drop precipitously. Because my books are geared to an elite audience (the same small group of people who read this blog), the books are all rather expensive (about $70-$75).
This morning, I noticed that Amazon just put a deep discount on my Ruby book (Ruby Programming for Medicine Biology). It's now $43.50 (a 36% discount from full price). So if there are any blog readers who have been reluctant to buy at the regular price, there's a price break in effect currently.