The book is excellent. It provides a great source of information to learn Common Lisp and programming techniques. The exercises are nontrivial which makes the book great to use in my classes. I am using it to teach programming courses.
Nevertheless, the kindle version has a lot of problems. The code blocks are images, so I can't resize the fonts, show them in the projector during the class doesn't work. There are a lot of small typos in the text. Some cross-references like "in page X" must be rewrite to links that better fit the electronic format. I am very frustrated with the current electronic version and I hope that Amazon improve it soon. It would be great to have some feedback from Amazon about my suggestions of improvement.