<p>do SAT 2 books published much earlier(eg 1994) differ much from the later editions? I was searching for SAT 2 books in the library and found Barron's SAT 2 world history(1996) and Barron's SAT 2 math level 2(1994). Any comments? Should i use these books or buy new ones?</p>
<p>Depends on the subject.</p>
<p>Like for math, they used to have levels I, IC, and IIC, and only the last two you could use a calculator on.</p>