A jewel thief meets his match in a woman who just might put an end to his criminal career in this classic thriller from the author of The Saint series.

He's known as El Caballero. Like his father before him, Ramon Manrique is famous as a robber in South America. But Manrique's prowess becomes internationally renowned when he commits a string of heists of precious stones in New York and London, earning him the moniker of the Black Cat—a cunning criminal who eludes arrest time and time again. And just when it seems like he might be caught in a rival's snare, he takes captive a brainy beauty who becomes his partner in crime. But is the woman by his side his perfect accomplice or a dangerous trap?