If We're Not Married by Thirty, by Anna Bell, sees Lydia bump into her childhood crush again.
The synopsis says: "Lydia's not exactly #livingherbestlife. She never imagined she'd be here at thirty - newly single, a job that's going nowhere and her friends all winning at life when she's still barely taking part. So she jumps at the chance of a free holiday and jets off to sunny Spain.
Then, out of the blue, she bumps into her childhood friend, the handsome and charming Danny Whittaker. She's always had a crush on him and they soon enter into a passionate holiday romance.
But this relationship could be more than just a fling. Years ago they made a pact that if they were still single when they turned thirty they would get married. But no one really follows through on these pacts... right?
Could Lydia's back-up man really be her happy ever after?" If We're Not Married by Thirty is out in December 2018.