Hi, I have Jonathan's book with me also.
I suspect yours would be the first edition of his Wireless-Java book.
The second edition should be focus more on MIDP2.0
This book is not enough to get you prepared for the SC-MAD exam.
Best way to do is study specs, write codes and come to javaranch.com..always!
Good place to go is www.scmad.com
It has lots of info that you need for preparing SC-MAD.
I'll take SC-MAD next year, I'm MAD about this exam and ready to become MAD.