The British-born author died in Los Angeles on Saturday after being first diagnosed with breast cancer more than six years ago. Collins was the author of 32 books, including The Stud, The Bitch and The World is Full of Married Men.
Her older sister, the actress Dame Joan Collins, 82, said she was completely devastated by the news. The writer’s three daughters said their mother had broken new ground for female writers in fiction.
Collins' first book, The World is Full of Married Men, was published in 1968. She went on to sell more than 500 million books world-wide. Her books were famous for their racy content - her first novel was banned in South Africa and Australia when it was first published.