As has been mentioned above, you can download a free app for whatever device you want to use (e.g., tablet, computer, phone). Here's the link to the book from both Amazon and Amazon.de. Both have links on the right side to download the free reader app.
http://www.amazon.com/Wail-Life-Bud-Powell-ebook/dp/B0079NR9IC/ref=sr_1_2?ie=UTF8&qid=1329863417&sr=8-2
http://www.amazon.de/Wail-Life-Bud-Powell-ebook/dp/B0079NR9IC/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1329863247&sr=1-1
So if you have an Amazon account, the app will link to any e-books you buy, as well as public domain works that are free through Amazon and Project Gutenberg.