The Unknown Royal Heir by Kimber Swan

Life has become mundane for waitress, Daphne Michels until she finds a pair of tickets to the high society event of the season. Longtime friend, Dante, escorts her to the event after much prodding. Enigmatic Daniel, Duke of Balwart, literally sweeps her off her feet, but his abrupt departure leaves her wondering if the time they spent together was real or not. Weeks later he shows up unexpectedly, rescuing her from imminent danger. These events set the course of their adventure that spans the world over.

Farquadt is a small country run by a recluse king, last of his line. The nobles of the kingdom want nothing more than to dispose of him and rule. King and country are thrown into chaos as an unexpected heir shows up claiming what is rightfully hers. A waitress with no background learns her life is not what she thought it was.