A Little Night Rainbow — Susan Aylworth

Max Carmody was married once. It wasn't pretty. Now he finds himself stuck for the summer with a thirteen-year-old daughter he barely knows and a sister who will take her in, but not unless he comes with her. Marcie tells her dad she wants him to marry again, but the last thing this Mozart-loving car-parts manufacturer needs is romance. In fact, the odds of his ever marrying again are about as likely as finding a rainbow in the night sky.