Lord Jesus F Christ. The author writes a complete electronics book and gives it away for free, and your entitled rectum moans about having to type $0 to get it for free?
It's not about the book's merit or its price, it's about good faith. Bushwhacking the reader with unexpected hassles won't make them feel good about clicking the link, "free" or not.
While it does come off as self-entitled, it is worth considering that there are a lot of people in the world who are competing for our attention. Sometimes legitimately, sometimes not. Even in the legitimate cases, it is enough to overload most people.
Perhaps it is better to make the point using more considerate words, something to the effect of: hey, we should be thankful that the author is providing the option to get the book for free.
