Princeton Review books same year to year?

Hi guys. I was wondering if I could use the 2015 Princeton Review Books for the 2016 AP this year. I’m pretty sure they’re almost exactly the same year-to-year, barring any changes in the AP Curriculum. Have there been any substantial changes in the following courses?

Environmental Science
Statistics
Calculus AB
Micro and Macroeconomics
Psychology
Government and Politics

Thanks.

I took statistics two years ago; I don’t think the curriculum was revised (?? could be wrong), but I recommend using Barron’s instead.

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