I bought this book as I wanted an overview on AI. Well, this is even more than that. It's a great book, very easy to understand. Every chapter starts with the simple basic definitions, and gets more complicated, and there is a generous amount of information and pages for each topic. Reading it I find the answers to questions I've had for a while, so I really love how helpful this book can be. I have the third edition, and I am mainly interested in the probabilistic reasoning part. The authors have a great writing style, they have such good jokes that it really gives me the feeling they loved writing the book and they want the reader to be relaxed and enjoy the field, so it's hard to put it down once I open it. I think it also has a good flow, the reading flow and the ideas are not interrupted, and it progresses nicely, without making me feel overloaded with information.
The mathematics is understandable, I didn't find pages with more formulas than text as I saw in other books in the field. So it's not a scary sight.
I think that compared to any other book on AI this is way beyond, and it is the one to buy as it saves a lot of time of searching the web for answers. So if you need a book on AI, if this book cannot help you, no other book will. And another aspect I really appreciate at this book is its price. I can't believe when I read it that it was the cheapest among my latest acquisitions on ai and machine learning, and it contains so much more useful information than any of them! This is a great thing. You will notice that the paper quality is not as high as in other books, but this is something I love. I don't want to pay for the glossy paper, as I'd rather pay for more pages!
Just another point for who might be interested in case based reasoning : this book almost doesn't mention it! It's only mentioned in a Bibliographical and Historical chapter, in one paragraph. Therefore, I'd advise to check the table of contents and see if the authors write about what you're interested in. If they do, that'll be a pleasure to read!