Catherine Isaac was born in Liverpool, England. She studied History at the University of Liverpool, then Journalism at Glasgow Caledonian University, before beginning her career as trainee reporter at the Liverpool Echo, where she worked until she was appointed Editor of the Liverpool Daily Post. She wrote her first book, Bridesmaids, while on maternity leave, under the pseudonym Jane Costello. Her nine subsequent novels were all best-sellers in the UK.
'You Me Everything' was her first book writing as Catherine Isaac. It was selected by the Richard & Judy Book Club, has been translated into more than 20 languages and a movie adaptation is currently in development by Lionsgate and Temple Hill. In March 2019 it won the RNA Popular Romantic Fiction Award, as voted for by booksellers, librarians and book bloggers. Catherine’s next novel, ‘Messy, Wonderful Us’ will be published in spring 2020. She lives in Liverpool with her husband Mark and three sons. In her spare time she is an active member of a running club, enjoys walking up mountains in the Lake District and reads a lot of books.