I am preparing too, and I am using Safari online. I purchased membership, and Cade's book is in it. I think around 10us$ for 1 month and you can view up to 5 books i think. UML Distilled 3rd ed is in it also. But the GOF book is not. Take note that this is reading book online, not purchasing a hard copy or something like that, although you have controlled/limited number of chapters you can download, as per membership.
Joined: Feb 26, 2005
i think the ejb book by haefel (ejb 2) mentioned in Sun, is also in the Safari. Well, even the ejb 3 by haefel/burke is in it.