Elizabeth Cavanna Harrison was an American author who wrote more than 80 romances, mysteries and children's books in a 45-year career. She died at her home in Vézelay, in central France at 92.
Most of Ms. Harrison's books were written under her maiden name, Betty Cavanna. She also used the names Betsy Allen and Elizabeth Headley. Her stories about the difficulties of adolescence appealed to generations of teenage girls. In early works like ''Going on 16'' (1945) and ''A Girl Can Dream'' (1947), characters confronted loneliness, sibling rivalries and tense mother-daughter relationships.
Ms. Harrison also wrote a nonfiction series called ''Around the World,'' based on young people she met in the Caribbean, Europe, South America, Asia and Africa. She often traveled with her husband, George Russell Harrison, a dean of science at the Massachusetts Institute of Technology, whom she married in 1957.
In the 1970's, she turned to mystery writing. Two of her books, ''Spice Island Mystery'' (1970) and ''The Ghost of Ballyhooly'' (1972), were runners-up for the Edgar Allan Poe Award. Her last book, ''Banner Year,'' was published in 1987.
She is survived by a son, Stephen Cavanna Headley, from her first marriage.