on 16 May 2008
If your new to relational databases and don't know much about PostgreSQL, you'll find this book a great introduction. It doesn't cover all of the new features, nor does it cover many advanced features. But what it does cover it does well, with well written text and good examples.
If you already know what you're doing you will probably want more, but you might want this one just to get you started if you can afford more than one book on the subject.