The Tortallan Universe is the setting of most of Tamora Pierce's books and refers to the universe that encompasses Tortall and the surrounding lands. The books are mainly set in Tortall, but other countries provide the setting for a few books.
The other universe created by Pierce is the Circle Universe aka The Emelanese Universe. The two universes are completely separate and there is no overlap at all.
Books are listed by publication date. HE (Human Era) refers to the time period within the Tortallan Universe.
- Song of the Lioness quartet (set mostly in Tortall, 5th century HE)
- The Immortals quartet (5th century HE)
- Protector of the Small quartet (set mostly in Tortall, 5th century HE)
- Daughter of the Lioness duology (set almost exclusively in the Copper Isles, 5th century HE)
- Provost's Dog trilogy (set exclusively in Tortall, 3rd century HE)
Tortall and Other Lands: A Collection of Tales, a collection of short stories, was published in 2012 after the full-length books. Three short stories are set within the Tortallan Universe.
- Elder Brother (set in unnamed region)
- Student of Ostriches (set in Southern Lands)
- A Dragon's Tale (set in Carthak)
- Nawat (set in the Copper Isles)
- A trilogy on Numair Salmalín—The Gift of Power as the first book (unpublished)
- A companion book with maps and other info included (unpublished, date unknown)
- A book about Maura of Dunlath—as T Pierce has many other books planned both in this universe and in the Circle Universe, it is doubtful that a book on Lady Maura will be published any time soon.
- Alanna of Pirate's Swoop and Olau, protagonist of The Song of the Lioness quartet
- Veralidaine Sarrasri, protagonist of The Immortals quartet
- Keladry of Mindelan, protagonist of the Protector of the Small quartet
- Nealan of Queenscove (supporting character), many antagonists
- Aly of Pirate's Swoop, protagonist of the Trickster Series duology
- Rebakah Cooper, protagonist of the Provost's Dog trilogy
Nations and peoples of the Tortallan Universe
Pierce bases a lot of countries and societies on real life.
- Tortall, based on generic western European medieval society with some Renaissance elements
- Carthak, based on ancient Egypt and ancient Rome
- Copper Isles, based on the Philippines
- Yamani Isles, based on Japan
- Scanra, based on Scandinavia
- Maren, based on western medieval society like Tortall
- Galla, based on medieval France (literally in the name "Galla" vs. "Gaul", shares other similarities of course)
- Sarain, mix between Tortallan culture and Cambodian/Vietnamese culture
- Barzun (conquered by Tortall in the 4th century HE)
- Raka, based on indigenous people of the Philippines
- Bazhir, based on the Bedouin tribes
- K'miri, based on the Mongols