Ask YC: What is a good book about the JVM?
I'm looking to learn some bottom-up Java - any suggestions?
http://www.amazon.com/Covert-Java-Techniques-Decompiling-Eng...
http://www.amazon.com/Decompiling-Java-Godfrey-Nolan/dp/1590...
Venners book has free chapters online (be careful this is pretty old):
Online: