Screaming Penguin - Source Does Matter

I have been neglecting the "book reviews" for a long time. In an effort to get started slowly a quick book review of "Java Puzzlers" by Joshua Block and Neil Gafter is thus: It is a great book for Java developers which is entertaining to read and very educational at the same time - highly recommended.

Yes I know its a year old but I just recently picked it up and felt it still warranted mention.

Some examples (apparently from before the book was published, but same material) are here.

The book itself is: Java Puzzlers.