<p>hi, i have th AMSCO book for U.S. history but it not the revised edition, so should i buy the revised edition? i don't really want to buy unless there a huge difference, so yea.</p>
<p>I wouldn't worry about it. AMSCO probably just updated the last chapter about what happened the last decade or so. I'm pretty sure that first 200+ years are still accurate =)</p>