When we talk about Bitcoin, I find it heartwarming to find new services accepting Bitcoin as a payment method. Even though they may only be temporary deals, at least the merchant is showing an interesting in cryptocurrency. OR Books is one of those merchants, and they have two interesting e-books for sale in exchange for Bitcoin!
OR Books currently have two different e-books on sale for the price us US$1. While this is a generous offer in its own right, the fact OR Books accepts Bitcoin payments only makes it better in my book. The following books will remain on sale for that price during the rest of the week :