The thing about Anne Frank and the ballpoint pen is myth. Google "anne frank" and "ballpoint pen" and note the number of anti-Semitic websites that pop up, all of which get at least one fact wrong: not only was the ballpoint pen invented long before WWII, they were available in Europe by 1944. (Q.v.
here) Moot point: the ballpoint was used during the editing of Frank's diary, which editing apparently did omit some sexual detail and other sections that publishers felt would alienate an already beaten German readership.
But oh yeah: decent book, melodramatic movie.