However, Castaneda's work is seen as being fictional, inaccurate, misleading, and plagiaristic, and there is substantial evidence to support the interpretation that both "Carlos" (a character in Castaneda's books) and don Juan (the sorcerer) are fictional creations.[25][26][27] Although the Yaqui are indigenous to the Sonoran Desert region of northern Mexico and southern Arizona, far from the Maya region, Mayanism often conflates the concept of Toltec (Castaneda) with the Toltec who interacted with the ancient Maya. This stems from 19th century speculations by Brasseur and Charnay about the Toltecs as a white, Aryan race that brought advanced civilization to the Americas either through a migration from Asia across the Bering Strait (according to Charnay) or emigration from the lost continent of Atlantis (according to Brasseur).[28]