There is a better review than what I could write in the Chronicle of Higher Education from December: http://chronicle.com/temp/reprint.php?id=v1xvs1p6k37s7jtw4qpfj7pqykln5z50

I enjoyed the book very much, though it took me nearly 3 months to complete. As always, even in her jottings and short notes, Sontag offers much to chew on. I'm not sure I trust her son's editing choices and would prefer access to an unabridged version. Some entries are tedious - long lists of authors and books to read (she was quite voracious!), but overall a very profound glimpse into Sontag in her earlier years. I am looking forward to future publishings of her later notebooks!