Hi Brian -
I don't think the book is an awesome exam prep guide. I didn't really try to write one. I was more interested in writing a book for someone who wants to find work as a
Java programmer, and who plans to use the OCA exam as a stepping stone. I am far more interested in what it takes to prepare a person for a job programming in Java. To me, certification is just a means to that end. If by the end of the book you have the tools you need to start reading and understanding Java APIs, I'll feel like I did the job I intended.