I agree with sadly disappointed. I found the information good, but not enough to pass the Security + test (not even enough to pass its own practice tests. I haven't taken the test yet, but am nervous about doing it because of the results of the practice tests (and I have been reading about 3 different books on the subject).
Many of the answers are not in the book, at least if they are you cannot find them. If you try to find it in the index - good luck. Sometimes the answers are totally different in the test than in the book.
Here is an example. In the book, it has a large section on Incident Response. The diagram they give show a circle with the order as identifying, investigating, repairing and adjusting procedures (identifying is a the bottom - I would have expect it to be at the top). At the beginning, the book gives the order as identifying, investigating, repairing, documenting and adjusting procedures, which is what one of the questions on Incident Response gives. Except that when you read the whole section, it says that during the entire process you should be documenting - therefore it shouldn't be in the step order (as one question has it before the recovery and one after).
Then on the other practice test the question is:
What are the six phases, in the correct order, of incidence response. Six? I only counted 4 or 5 (if you count documentation as a step).
Guess what the answer is? Not what you were told in the book.
Preparation, identification, containment, eradication, recovery and follow up.
If you look at the suggested answer on the test, it says - This order was originally designated by SANS. WHAT ???? The is no where in the IR section. Maybe in some obscure section, which I have been unable to find. But this is just an example of it.