You can get a digital version of the book by going to Apress' web site:
http://www.apress.com/promotion/tendollarIf you've purchased the book, you can get the digital version for $10. Just visit the link above, answer a couple of questions, and you'll get a promo code that will let you download the digital version.
Thanks for your feedback! I appreciate it, and let me know if you run into problems getting the ebook.