I have the bare bones of a page on my website for 1Z0-028. Right now it has just the relevant Oracle documentation and three books on Amazon. As Tim said, none of them are specific to the 028 exam. However, I did a comparison of exam topics to the table of contents of the books and all had some overlap with the exam. Perform your own analysis in deciding if they cover enough of the contents of the exam to be worth spending your money for one.
If nothing else, the Oracle documentation is free to download and is arguably the best source for preparing for the exam.http://www.oraclecertificationprep.com/ ... AM:1Z0-028