Van Maarsen , who had previously written two books about Anne , had been giving lectures about her childhood friend since 1987 .
The book was about the friendship of the author with the famous diarist , Anne Frank .
Van Maarsen , who had previously written two books about Anne Frank , had been giving lectures about Anne Frank 's childhood friend since 1987 .
The book was about the friendship of the author with the famous diarist , Anne Frank .