You should consider buying this book. The author spent a lot of time and worked hard to write and publish it. Why would you think you can download it for free when no bookstore would give you a paper copy? I don't believe any e-readers use PDF as its format is fixed so the text is not scalable to adapt to screen size.
A very good e-reader for 99. The “Deeper” edition of this book is available. If you buy the books with the “Deeper” edition, you get the “Deeper” book with a larger font size and better navigation (in the main page where you can search e-books). There are other reasons for buying a “Deeper” edition. If you buy a “Deeper” edition, it's like getting a paper freebie. So you pay twice for the “paper freebie”, plus taxes for electronic delivery. I prefer the “Paper” Edition because it's much easier to read and navigate. The Kindle has an e-reader for free download.