Discover the Hidden Legacy of England’s Past. In Below the Salt, Thomas B. Costain masterfully blends historical fiction with a captivating mystery. Set in 13th-century England, the novel imagines a lost princess and a secret royal bloodline that could have altered the course of history. As a modern-day descendant embarks on a quest to uncover this hidden legacy, readers are transported between past and present in a tale of intrigue, romance, and the enduring quest for justice.​ Costain's rich storytelling and meticulous attention to historical detail make this novel a must-read for fans of epic historical fiction and literary mysteries.