Louise Cooper (29 May 1952 - 21 October 2009) was a British fantasy writer who lived in Cornwall with her husband, Cas Sandall.
Cooper was born in Hertfordshire. She began writing stories when she was at school to entertain her friends. She continued to write and her first full-length novel was published at the age of twenty. She moved to London in 1975 and worked in publishing before becoming a full-time writer in 1977. She became a prolific writer of fantasy, renowned for her bestselling Time Master trilogy. She published more than eighty fantasy and supernatural novels, both for adults and children.
Cooper gained a great deal of writing inspiration from the coast and scenery, and her other interests included music, folklore, cooking, gardening and "messing about on the beach". She was treasurer of her local Lifeboat station; she and her husband both sang with the shanty group Falmouth Shout.
Cooper died aged 57 of a brain haemorrhage on 21 October 2009. Her husband survives her.