Tirole's book is, without doubt, a comprehensive and detailed explanation of modern IO theory. Although, at first, the structure of the book seems a bit awkward, the truth is that when you need detailed information on any aspect of IO it presents you with a complete, easy to understand review of its theory. I think that after reading Martin's Advanced Industrial Organisation,as an intermediate approach to IO, which is a fine, well structured book, if you want to get a deeper knowledge about IO, Tirole's book is, in my opinion, an excellent buy.
Although the book is now 12 years old, it is still the most recommended reference in top academics departments. The clarity of the writing and the width of the content (from the basics to a very advanced level) are some obvious qualities. The use of math is restricted at its minimum, with many graphics to emphasize intuition. The author, known as one of the leading scholars in micro theory, has also introduced many examples of applications and exercices. In the age of the Microsoft trial and antitrust issues, this is a book that will interest everyone. For the record, I have heard it will soon be translated in Chinese (mandarin) !
Soweit ich weiß ist das Buch von Tirole immer noch das Haupt-Lehrbuch in vielen Kursen zu Industrial Organization. Wer das Buch gelesen hat, weiß auch, dass dies nicht verwunderlich ist. Man sollte mindestens einen Grundkurs in Mikroökonomie belegt oder ein Buch dazu gelesen haben um den Inhalt zu verstehen.