If you’re an extraordinarily talented and/or hard-working student, buying just the Official Guide might suffice (or even just the free online SAT practice tests).On the other extreme, if you have drifted through school and recently regained your scholarly zest, an ensemble of books might be required to get yourself battle-ready.
most accurate description of the kind of questions to expect on the test day.
Advantages: Very good approximation of the question types that will be asked on the actual test.
Disadvantages: Explanations of the solutions leave a lot to be desired.
The concepts are lucid, not formidable for an average student, and do their job perfectly.
It is also quite comprehensive: you can be pretty sure that almost no question type will be spared once you have practiced with this book.