Love and Leprechauns (The Ballybeg Series, #3) by Zara Keane
Falling for her ex…
Olivia Gant is determined to escape her past and build a new life. Only desperation drives her to rent business premises from Jonas O'Mahony, the man who tattooed her behind and broke her heart.
Jonas is a struggling single father. The last person he wants next door is the beautiful-but-infuriating Olivia. A childcare crisis forces him to strike a bargain with her: the lease to the cottage in return for babysitting.
When Olivia's ex is clobbered to death with a garden gnome, the fickle finger of suspicion points at Olivia and Jonas. Can they prove their innocence, or is their happily ever after doomed?