Although it was an autograph book, bound with red-and-white checkered cloth and with a small lock on the front, Frank decided she would use it as a diary, and she began writing in it almost immediately.
Selvom det var en autografbog, indbundet i rødt og hvidt læder med en lille lås på forsiden, besluttede Frank sig for at bruge den som dagbog, og hun begyndte at skrive i den næsten øjeblikkeligt.