The Car of Destiny

This one's a bit different from the usual Williamson fare. The main similarity is in a car and in travel, but we have a bit of a Romeo-and-Juliet scenario here, with even an unscrupulous rival who will stop at nothing to keep Ramón from getting Monica. A king and his bride even take a hand in events, as well as rich American Dick Waring, Ramón's best friend, his chauffeur Peter Ropes, and Mr. and Miss O'Donnel, Irish-Spaniards, otherwise known as the Cherub and Pilar. Even the brave bull Vivillo has his part to play.
A colorful story with a satisfying conclusion!