Here is a list of books you should read if you want to get a better understanding on Android. Also, the blog is heavily based in all these titles. I recommend you to get into these books if you really want to go deep, starting from the top of the list, going all the way down:
- Embedded Android – Karim Yaghmour
- Android Security Internals – Nikolay Elenkov
- Android Programming: The Big Nerd Ranch Guide – Bill Phillips and Brian Hardy.
- Decompiling Android – Godfrey Nolan
Other interesting articles you might want to read:
- Open Binder – Dianne Kyra Hackborn