<p>I've read many posts on this topic but some things have been contradictory. I just want to clarify some things. I'm sorry if this has already been a much discussed question.</p>
<p>1) Between number editions (like sixth, seventh, and eighth) there are very few differences. Differences include updated pictures and obviously few pieces of updated info. Different editions will not affect my AP exam score.</p>
<p>2) Between AP edition and regular edition (by the way, is the regular edition called "college edition"?) the difference is that the AP edition has a lot more "trivial info" that don't show up on the AP exam. Different editions will not affect my AP exam score. What was confusing was that someone said that he/she had asked Jane Reece about the differences and she said "AP edition cover is more durable, and has introductory material in the beginning." That's it.</p>
<p>Please help me clarify the differences. Thanks.</p>