My daughter is looking for a copy for an elective reading assignment for next year's AP US History class.  There are dozens of versions out there and I'm sure some are better than others.   I wondered if anyone here could suggest (or suggest against) any particular version. 

TIA  : )

(cross posted in Biographies forum)

I like the Bedford/St. Martin's edition because it has some introductory information and explanation to help the reader better understand what's going on in the autobiography. It's not the typical autobiography--it's cut up into sections that were written at different times--and I thought the explanation in the introduction helped me to understand the format better.

That said, you can probably find similar information on the internet if you just get a simple, cheap version with just the autobiography inside.

It might be hard to find, but Norton used to do what they called Crritical Editions. They had a lengthy introduction by someone whose area of critical expertise was the author, then an annotated text, then as many as a dozen critical articles done over the years about the book.