Have you heard about this? Amazon has a new program, called "MatchBook," where you can get greatly-reduced prices on ebooks for Amazon books you've purchased previously in print editions.
Not every book is eligible for this... but Stone and Silt is, thanks to my always-on-the-ball publisher.
What it means is this: if you purchased a print edition of the book from Amazon, you can get the Kindle version for a mere 99 cents. That's a four-dollar savings or, as I like to think about it, two tall Americanos at Starbucks.
You can easily see which of your past Amazon book purchases are eligible through this Amazon page.
I believe MatchBook is only available in the U.S. at this time. Hopefully it'll be expanded to other countries, like Canada and the U.K., very soon.