I purchased general GRE prep books for math and verbal in fall 2008 (whatever was current then) when I thought I'd be studying for the GRE. I decided to work instead after graduating in 2009, but I'm finally going to start studying for the GRE, take it before the August 2011 changes, and apply to Ph.D. programs this fall for fall 2012. I'm having trouble finding a history of GRE changes for the past few years or any information about whether I could still use my old prep books. Do you think they are still ok to use? I'd of course rather save money than not, but I'm ok with buying new books if it'd mean I'd be better prepared. I'm not sure which ones I purchased (Kaplan, etc.), but I'm getting the books from my parents' home tomorrow, in case that impacts your answer.
I also purchased a prep book for the Psychology subject test in fall 2008. Same question- has this test changed and can I still use my old 2008 book?
Thank you!