Written with Elizabeth Scarborough, the Petaybee series tells of Major Yana Maddock, sent to an arctic planet on a medical discharge. She gradually discovers that the planet itself is sentient, and is healing her and protecting itself from those who would exploit its resources.
Many of the books Judith Tarr has written are historical fiction. In ancient Egypt, Queen Hatshepsut proclaims herself king in King and Goddess. Throne of Isis is the story of Cleopatra and her priestess Dione, the voice of the goddess on earth. Set in medieval times, Queen of Swords tells of Melisende, Queen of Jerusalem, and her attendant, Lady Richildis. The Eagle's Daughter takes place at the end of the Roman Empire, and is about Princess Theophano, daughter, wife, and mother of emperors.