SAT prep book: "Hack the SAT" "Rocket Revolution"

<p>Are any of these books useful? Is it very useful? I got some positive response from people about the two books.</p>

<p>I have 1550 SAT score, and i want to bump it to a 1900-2000 range.
Is it possible, by reading the two books? If not, what do you recommend for low level SAT students like me? What particular book, or what specific way should i approach the test?</p>

<p>I've been doing tons of online SAT preps, and SAT programs (GATE SAT, not Elite or Princeton Review) and it was a complete waste of money ($1000-1500)</p>