Interesting new book covering advanced Apex topics such as execution context, asynchronous programming, robust design patterns and so on.. Excellent addition to the Force.com Developer’s arsenal!

Advanced Apex Programming – Author: Dan Appleman
Table of Contents

Update (2012-09-10)
I now have my hands on this book and have to say I’m really impressed. So often I work on projects where the principles of Thinking in Apex have been overlooked and basic mistakes made – now there’s an alternative to having to infer the right mindset to bring to Force.com development from the technical documentation. Well documented design patterns that address real world concerns can only help raise the quality bar.