During the Nazi occupation of the Netherlands, Anne Frank received a diary as one of her presents on her 13th birthday. She began to write in it on June 14, 1942, two days later, and twenty two days before going into hiding with her father Otto, mother Edith, older sister Margot, and another family, Hermann van Pels, his wife Auguste, and their teenage son Peter. The group went into hiding in the sealed-off upper rooms of the annex of her father's office building in Amsterdam. The rooms were concealed behind a hidden door. Mrs. van Pels' dentist, Fritz Pfeffer, joined them four months later. In the published version, names were changed: the van Pels are known as the Van Daans and Fritz Pfeffer as Mr. Dussel. With the assistance of a group of Otto Frank's trusted colleagues, they remained hidden for two years and one month.
Anne described to "Kitty", as she addressed her diary, her close relationship with her father, her lack of daughterly love for her mother, with whom she felt she had nothing in common, and her admiration for her sister's intelligence and sweet nature. She did not much like the others initially, particularly Auguste van Pels and Fritz Pfeffer (the latter shared her room). She was at first unimpressed by the quiet Peter; she herself was something of a chatterbox (a source of irritation to some of the others). As time went on, however, she and Peter became very close, though she remained uncertain in what direction their relationship would develop.
They were betrayed in August 1944, which resulted in their deportation to Nazi concentration camps. Of the group of eight, only Otto Frank survived the war. Anne died in Bergen-Belsen from typhus in early March, about two weeks before the prisoners were liberated by British troops in April 1945.
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