This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Note sure if you know but the exam codes have been changed to 1Z0-895 and 1Z0-898. There are no books that are focused just on the certification exams for these two certifications as of now in the market.
You may want to check out the books that can be helpful here in the Relevant Books sections: OCE-EJBD and OCE-JPAD.