Hi Debra,

When I was at Micro Endeavors, I wrote the only other commercially available "prep" material. It's available as a self-study course, visit their web site for details and pricing. You can also check out the VFP Wiki (http://fox.wikis.com) for study guides there.

Other than either of these books, all you can do is review what you know and check that against the objectives of the exam. I don't know if the objectives are printed in the book, but I do know they're available on the MS web site. Here's a link for the desktop exam:
http://www.microsoft.com/trainingandservices/exams/examasearch.asp?PageID=70-156

Use these materials as a guideline to check your readiness for the exam. Remember, the exam is $100 each time you take it.

Good luck.