<p>i'm self studying for a AP.
the college board recommends several books which i have 2.
but mines are 4th edition compraed to 6th editions recommended from the site.</p>
<p>is there much difference between 4 and 6???
or should i just get a new book.</p>
<p>What subject and book is it?</p>
<p>More often than not, the main information doesn't change very much between editions. A lot of changes are generally cosmetic, and probably different questions/problem sets.</p>
<p>for physics, i have giancoli and college physics.
both are not my book though. do you think its worth it to buy a newer one?
thanks in advance.</p>