I have recently finished this book and have to say that it brilliant - packed with an incredible amount of actionable points that you can apply to your business. I wish that I had come across this sooner, however the principals within will be applied to my current business website (service based) and ones I will be launching soon (product based). I'd also recommend you visit the author's website too - there are some freebies that compliment the book as well as further reading suggestions. The best thing about this for me, is how accessible it is - there's very little psych-lingo so its easy to read and absorb.
If you are involved in business and are in any way connected to the website, or know someone who is, this is essential reading to make your online environment as persuasive as possible. A genuine tool for growing your business.