Silver Thunder

NO MAN COULD TAME HER REBELLIOUS SOUL...
She was as wild as the rugged Wyoming Territory of her birth, all woman, primal and exciting, a platinum-haired enchantress who dressed and rode like a man. No one had ever threatened Jessica Randall's independence -- until the stranger called Segundo led her into the uncharged world of the senses, compelling her to trust, to yield, to love with a passion she never knew she possessed.

NO WOMAN COULD RESIST HIS SENSUAL CHALLENGE...
He stared at her with turquoise eyes glittering with blatant sexual hunger. Here was the girl Duncan Frazer had dreamed of in his years of exile, grown to glorious womanhood, a woman he vowed to possess. He couldn't afford to reveal his true identity any more than he could resist the challenge to a game of hearts. A game he was determined to win....