Rachael Johns has started writing Harlequin Special Editions and her first one is now out. It's Not You, It's Her sounds like a really fun premise. This book has not one title but two. In some territories it's called A Dog and a Diamond.
Blurb
How to break up with someone else’s fiancé
by Chelsea Porter, aka The Breakup Girl
* Tell him it’s not him, it’s her.
* Try to ignore how gorgeous Callum McKinnel is. You are breaking up with him, after all.
* Fall just a little bit when he rescues your dog.
* Try to resist when he asks you to join his family for Thanksgiving dinner in Jewell Rock.
* Succumb anyway.
* Succumb to a lot more than that.
* Remind yourself that you are The Breakup Girl. You don’t do commitment.
Wonder what would happen if The Breakup Girl stopped following her own advice…