Colleen Margaretta McCullough was an Australian author known for her novels, her most well-known being The Thorn Birds and Tim. Raised by her mother in Wellington and then Sydney, McCullough began writing stories at age 5. She flourished at Catholic schools and earned a physiology degree from the University of New South Wales in 1963. Planning to become a doctor, she found that she had a violent allergy to hospital soap and turned instead to neurophysiology – the study of the nervous system's functions. She found jobs first in London and then at Yale University in New Haven, Connecticut.

After her beloved younger brother Carl died in 1965 while rescuing two drowning women in the waters off Crete, a shattered McCullough quit writing. She eventually found her way back to writing and continued to have a successful career as an author.