Best ACT prep book?

<p>I'm taking the ACT in September, and I am aiming for a high score (33+). If I manage a 36, I'd s*** my pants out of excitement. ...BUT I need a good prep book. I'm probably going to spend a month max studying. </p>

<p>Any recommendations? </p>

<p>Extra question: When do we start applying for colleges and stuff? haha I'm clueless. Because I want to take 3 Subject tests (Math II, US H, Biology) in October 2011, Senior year. Is that too late?</p>