Leslie Charteris (born Leslie Charles Bowyer-Yin, 12 May 1907 – 15 April 1993), was a British-Chinese author of adventure fiction, as well as a screenwriter. He was best known for his many books chronicling the adventures of his charming hero Simon Templar, alias "The Saint".
Charteris was born Leslie Charles Bowyer-Yin, in Singapore. His mother, Lydia Florence Bowyer, was English. His father, Dr S. C. Yin (Yin Suat Chwan, 1877–1958), was a Chinese physician who claimed to be able to trace his lineage back to the emperors of the Shang dynasty.
Leslie became interested in writing at an early age. At one point, he created his own magazine with articles, short stories, poems, editorials, serials, and even a comic strip. He attended Saint Andrew's School, Singapore, and after moving to England, Rossall School in Fleetwood, Lancashire.