A good one is 'Pretty Girls' by Karin Slaughter. It's a gritty thriller with a strong family dynamic and a touch of romance. The story of the sisters and their search for the truth about their sister's disappearance is filled with tension and there are some romantic elements that are intertwined with the overall suspense of the plot.
I really like 'The Wife Between Us' by Greer Hendricks and Sarah Pekkanen. It's a book that keeps you guessing. There's a love triangle that's not as straightforward as it first appears. The suspense builds as the true nature of the relationships is slowly revealed. It has great twists and turns that will keep you hooked from start to finish.
Sure. 'Before I Go to Sleep' by S. J. Watson is excellent. The protagonist wakes up every day with no memory, and as she tries to piece together her past, she discovers a web of secrets and a relationship that may not be what it seems. It's full of suspense and the romance aspect adds an extra layer of complexity.