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Title: We always learn something from a book!
Review: In this case, the point to take home is how to not write a book. This book does the worst job of explaining concepts in computability and complexity theory. There is no intuition given behind any of the proofs. Moreover, the language is so bad (I mean way beyond being terse) that most of the times it takes longer to read than it would take to read from another decently written undergraduate text on the same topic/proof. Most of the proofs start with "It is obvious" when it is far from it. It is really sad that such a beautiful subject is treated in such a manner. It is even more sad (and surprising) to see that it is used as the main textbook in a course on complexity theory. I would recommend reading from Sipser or Papadimitriou.
