Ágota Kristóf (Hungarian: Kristóf Ágota; October 30, 1935 – July 27, 2011) was a Hungarian writer who lived in Switzerland and wrote in French. Kristof received the European prize for French literature for The Notebook (1986). She won the 2001 Gottfried Keller Award in Switzerland and the Austrian State Prize for European Literature in 2008.

Agota Kristof was born in Csikvánd, Hungary on October 30, 1935. At the age of 21 she had to leave her country when the Hungarian anti-communist revolution was suppressed by the Soviet military. She, her husband (who used to be her history teacher at school) and their 4 month-old daughter escaped to Neuchâtel in Switzerland. After 5 years of loneliness and exile, she quit her work in a factory and left her husband. She started studying French and began to write novels in that language.

Kristof's first steps as a writer were in the realm of poetry and theater (John et Joe, Un rat qui passe), aspects of her writing that did not have as great an impact as her trilogy. In 1986 Kristof’s first novel, The Notebook appeared. It was the beginning of a moving trilogy. The sequel titled The Proof came 2 years later. The third part was published in 1991 under the title The Third Lie. The most important themes of this trilogy are war and destruction, love and loneliness, promiscuous, desperate, and attention-seeking sexual encounters, desire and loss, truth and fiction.