Patricia Kay 
Billionaire and His Boss [EPUB ebook] 

A billionaire in disguise When Alex Hunt’s father challenged his four sons to a marriage showdown, Alex had to come up with a plan – fast. But the bride-hunting billionaire didn’t expect to find the perfect candidate in redheaded PJ Kincaid, his all-business boss! PJ’s agenda did not include falling in love. But her irresistible new employee was making it hard to keep her mind on work. Then she discovered Alex’s true identity…Yet PJ was hiding a secret of her own. Would all her romantic hopes and dreams be dashed when midnight struck? Or would this unlikely Cinderella get her prince after all?