Hi! From now on, let's move the conversations over to the new cert forum for SCMAD
My recommendations for a book are:
1) If you are new to J2ME/MIDP, get the one by Jonathon Knudsen (sorry I can't remember the name! It is the one that covers MIDP 2.0 -- so you have to get the right edition and not an older one).
It won't cover everything you need -- it does not go deep enough. But it's not bad for learning if you are brand new to J2ME and MIDP.
2) The Style Guide by Cynthia Bloch is also good. It *does* have helpful tips for some of the performance-related issues. Get this if you already understand how to write MIDP 2.0 MIDlets.
It is not needed for the exam, but it DOES have tips which are covered on the exam, and if you don't learn them on your own, this book can help point you in the right direction. I'll say more on this a little later...
The most important documents, of course, are the MIDP 2.0 and CLDC 1.1 specs. But you also need the JTWI spec and the WMA and MMAPI specs. Just download them all and keep them handy. The ones I referred to most are MIDP 2.0 spec and APIs, and CLDC 1.1. But there is a whole objectives section on WMA and one on MMAPI as well.
have fun
-Kathy