The book "Innovator's Dilemma"

Couple of days ago I've finished the book "Innovator's Dilemma" by Clayton M. Christensen.
I read several times that it is "the best business book ever written" an so on.
Well, I don't know is it true, I haven't read a lot of business books.
The book is really interesting, but the main idea of the book, that there are so called "disruptive technologies", which can't be handled by existing businesses seems rather natural.
Why else new businesses would appear after all?

I was able to download this book for free from Internet shop bizbook.ru, because they give 20 pages preview of the book for free (in very poor quality images).
So I've used number of anonymous proxies and downloaded the whole book.
I had to do it because I was unable to find the book in usual warez sources and p2p networks.
It a pity that I had to do such a thing myself, because it means that we don't have access to all the books worth to read even through pirate's networks.

By the way, I used my program Fit2PDA to convert this book, and it worked perfectly :)