This is the best book regarding deep learning available in the market and why not? The author, Ian Goodfellow is also the best in this field.
The harbound version which I bought is worth the price. I went through a lot of reviews before buying it and found few people reviewing the page quality to be bad, faded prints and all but trust me, there is none. You might find few things here and there but I found none and moreover, you can always get replacement if the product is faulty.
Just go for it if you are really interested in the subject. Kudos!!