Royal : a novel / Danielle Steel.

Summer, 1943. The King and Queen choose to send their youngest daughter, Princess Charlotte, to live with a noble family in the country. Despite her headstrong nature, the princess's fragile health poses far too great a risk for her to remain in war-torn London. She arrives in Yorkshire under an alias; only her guardians know her true identity. Charlotte befriends a young evacuee, trains with her cherished horse - and falls deeply in love with her protectors' son. When a tragic turn of events leaves an infant orphaned, the child is raised in humble circumstances by a stable manager and his wife. No one, not even she, knows of her lineage. When a stack of hidden letters comes to light, a secret kept for nearly two decades finally surfaces, and a long lost princess emerges. -- adapted from jacket.