I just bought the book Hello Android (published by pragprog.com)
A fine choice. I'm sure Ed Burnette thanks you!
What does your book cover that's missing in the book just mentioned.
Hello, Android and The Busy Coder's Guide to Android Development cover similar ground. Mr. Burnette covers some topics that mine does not (e.g., OpenGL). Mine covers the material in greater depth with a wider range of sample application code. For example, Mr. Burnette covers SQLite, using content providers, and creating content providers in a single 20-page chapter -- I use three chapters and about 40 pages. Of course, that could be that I'm just wordy...
The upcoming The Busy Coder's Guide to Advanced Android Development (Version 0.6 available for subscribers) will go beyond either of the introductory books, covering things like system services, remote services, system events, database packaging, unit testing, etc.