I’m only a few pages into the print version of this book and am really enjoining it.... except... the print margins are very narrow. Unless you are holding onto the very edges of the pages while reading, you fingers or thumbs will cover part of the print. So, the book is a bit uncomfortable to hold while reading. A book that is all about designing things to fit nicely with the needs of human users is itself not designed well! I’ll purchase the Kindle version to continue reading.