The Reluctant Heiress — Annabel Laine

Caroline Malcolm was the crowning jewel of Regency London's most brilliant social season. But tragedy haunted her. Twenty-one glittering diamonds had arrived at her door, mysteriously, anonymously. Twenty-one diamonds--one for each year of her young life... and each hinting at a lost legacy of wealth beyond her wildest imaginings. Individually, each precious stone formed a step on the path into her unknown past, a past she was mysteriously compelled to follow. Together they formed a tightening necklace of intrigue and death. Their trail led to Atherton, the lush, splendid estate of the only man in England who could help her--Charles Dornay, fifth Earl of Moriston, the notorious amateur sleuth.