The Aosa series of books are brilliant imho: http://aosabook.org/en/index.html http://aosabook.org/en/index.html Titles : * The Architecture of Open Source

The Aosa series of books are brilliant imho: http://aosabook.org/en/index.html http://aosabook.org/en/index.html Titles : * The Architecture of Open Source Applications (volumes I and II) * The Performance of Open Source Applications * 500 lines or less