Readers will know her better as Jane Costello but here is her first book as Catherine Isaac. You Me Everything - about a woman who leaves her boyfriend only months after giving birth to their son - is currently being developed as a movie.
The synopsis says: "You and me, we have history.
We have a child together.
We have kept secrets from each other for far too long.
This summer, in the beautiful hills of the Dordogne, it is time for everything to change.
You Me Everything is a heartfelt and unforgettable story about the lengths we are prepared to go to for those we love." It's out in April 2018. See the book trailer below: