Joan Johnston

The dying Duchess of Blackthorne is matchmaking for her four sons and daughter. Fabulous jewels - rubies, pearls, sapphires, emeralds, and diamonds, each bearing a legend - assist the Duchess in her quest to help her children find true love. Invincible features the priceless Blackthorne Rubies, a gift to the first Duke of Blackthorne from Henry II for saving his life in a battle for the throne of England.