I have not yet finished this book, so take this as a review on the material I have read.
This book is a pleasure to read. The book builds up slowly from the ground up, the proofs are very concise & clear. And, frankly one of the most interesting books I have read. Be ready with a notepad though, to solve and understand the proofs.

I am a complete beginner to the theory of computation!..however this book is one of the best books which cater to your needs in understanding computation, automata theories etc.!! It examples are simple and well explained. In addition it also discuses certain discrete mathematical topics in brief, which are required in the computational theory!!..Thus far it is a great book for beginners.

If you a beginner then just buy this book.I never have enjoyed theory of computation so much but after starting this book I am starting to like this subject.

One of the most interactive book I have ever read. This book explains concept in a very good manner. However this book lacks automata type examples , but theory is sufficient to solve any question from other book.

Best book ever to understand the basic computational complexities...

This book is a perfect starting point for beginners in this field. Concepts are developed gradually. Exercises are good.

It is f**king easy to understand the author by text what he want to say. But its exercise has a level much higher. And if you don't intend to solve that then don't buy this book.