You're being unfair to the OP, and would know if you read their article in full. They purchased a book and hated the DRM wrapped around it for use in their libr

You're being unfair to the OP, and would know if you read their article in full. They purchased a book and hated the DRM wrapped around it for use in their libre software lifestyle. Remember, piracy is a customer service issue. So perhaps buying your book isn't as easy as you thought, or your marketing is faulty, and you're not reaching the intended audience as well as you hoped.