Lois Duncan was an American author recognized as a foundational figure in young adult fiction, particularly in the suspense, thriller, and horror genres. Born in 1934, she began writing at a young age, eventually publishing numerous novels that explored themes often adapted into films, such as 'I Know What You Did Last Summer' and 'Killing Mr. Griffin'. Duncan's career saw a significant shift following the unsolved murder of her daughter, Kaitlyn, in 1989. This tragedy led her to move away from suspenseful themes, focusing instead on children's literature and nonfiction works addressing her daughter's case, like 'Who Killed My Daughter?'. She received the Margaret Edwards Award for her contributions to teen literature and continued writing until her death in 2016. Her work, though often grounded in realistic teen experiences, sometimes touched upon supernatural elements, reflecting a broader interest in the speculative.

Born Lois Duncan Steinmetz in 1934, Lois Duncan spent her formative years in Pennsylvania and Florida. Her parents were professional photographers, often working with circuses, an environment that later influenced her children's books like 'The Circus Comes Home'. Describing herself as a shy, bookish child who enjoyed nature, Duncan began writing and submitting stories at age 10, selling her first at 13. She briefly attended Duke University but left to marry and start a family. Her early career involved extensive magazine writing, publishing over 300 articles before turning to novels under the pen name Lois Kerry.

Duncan emerged as a significant voice in young adult literature, particularly in suspense and horror. Her novel 'Ransom' (1966) marked a move towards suspense after earlier romance works. In the 1970s and 1980s, she penned influential titles like 'Hotel for Dogs' (1971), 'I Know What You Did Last Summer' (1973), 'Summer of Fear' (1976), and the controversial 'Killing Mr. Griffin' (1978). These books often explored darker themes and were frequently adapted for film. Duncan's work in these genres, sometimes incorporating supernatural or speculative elements like astral projection in 'Stranger with My Face' (1981), earned her critical acclaim and the title 'queen of teen thrillers'.

The murder of Duncan's youngest daughter, Kaitlyn, in 1989 profoundly impacted her life and work. This event led her to largely abandon the suspense and horror genres she had mastered. She shifted her focus to writing children's books and nonfiction, including 'Who Killed My Daughter?' (1992), which detailed her search for answers regarding her daughter's unsolved murder. Duncan also established a resource center to aid victims of violent crimes. Her later works included children's novels and a sequel to her nonfiction book, 'One to the Wolves' (2013). Despite the shift, her earlier novels were re-released with updated content for contemporary audiences.

“I was hired on a fluke”

“I could no longer write about young women in life-threatening situations.”