It's great that you are planning ahead for the DAT and already developing a start on the material. What I would recommend is, if you are really a glutton for punishment, then purchase the Kaplan book now and start actively thumbing through its many pages. I have the second edition and the third one is no different than it so obtaining a soon-to-be-obsolete information is highly unlikely. Use it to familiarize yourself with the format and what to expect. Don't be that person who is one week out from their test date and posts a thread wondering what this PAT section is all about. This brings me to Topscore. The cd's come with somesort of time device. While they won't self-destruct, you won't be able to use them after seven months from the purchase date. A buddy of mine ran into that problem one week before his exam and we erased his cookie folder, temp files, and the like and nothing worked. He had to get something reset by the company in order to proceed with their program. In short, purchase Topscore about three to four months from your test date as you really don't need it until then. Best of luck!