Our book covers the full exam and both upgrade exams, with a separate appendix just for the Java 6 -> 8 upgrade exam. We have a mapping in the beginning the lists all the different objectives for each exam although if you are trying to review objectives for all three exams, it can be a little exhausting.
I recommend reading all of the chapters of the book and the appendix at least once. This will give you the widest breath of scope for knowledge. Which chapters you read twice and/or questions you practice with will depend on precisely which exam you are taking. For example, you do not need to know the FileVisitor interface if you are taking the full exam, just the 6 -> 8 upgrade exam so
you should tailor your study plan around that.