Vampire Viscount, The by Karen Harbaugh

"Sold into marriage to pay her father's gambling debt, Leonore Farley resigned herself to wed the mysterious Lord Nicholas St. Vire. Still, he was rich and charming, though a little pale. She had no way of knowing his terrifying secret. Only her love could end his nightmare, only his trust could save her soul. A Regency romance original." (from Amazon.com)

Paperback Info: ISBN 0451183193, Signet, 1995