As we cover new material in each new edition of Pro Android, we are pressed for space. As a result we have dropped some chapters from each edition. As a benefit to the readers and also the Android developer community we have asked APress, permission to make these chapters available for free downloads.
You can download these free Pro Android chapters from the links below
Here are the twitter handles for some of the contributors for androidbook.com
Satya Komatineni
http://twitter.com/SatyaKomatineni
Deepak Nenmini
We have started work ProAndroid 5. Keep an eye for more free on line chapters on a lot of new material that won't be placed in print edition due to size limitations!