Hello everyone! So I'm studying for the DATs with Kaplan this summer, planning on taking it around early September, and I'm also interested in buying this DAT destroyer book. It sounds ridiculously, incredibly amazing!! I've never been excited to buy a study book.. kinda weird. Anywho, I was wondering.. is this book updated every month? If so, when exactly is the best time for me to purchase it? considering I'm planning to take the test near the end of summer. And I'm also wondering if I should buy a used one because it's quite pricey as well, and of course that depends on knowing when the updates are made. Thank you!