Apart from this, I have the "Oracle PL/SQL best practices" book by Steven Feuerstein. You may google for that too, if you are interested in it. Though, as it covers only part of Oracle, I'm not sure whether it is something you are looking for.
However, as Oracle's software store is simply so huge, I doubt that there's a single "best practices" book which covers all aspects of Oracle software products. One by one, perhaps.