Which Carlos Castaneda book became a best-seller after its publication in 1968?

The Carlos Castaneda book that became a best-seller following its publication in 1968 is titled The Teachings of Don Juan: A Yaqui Way of Knowledge.12

As a key figure associated with the New Age movement, Castaneda gained widespread attention for his writings, which detailed his alleged apprenticeship with a Yaqui shaman named Don Juan Matus. While the book was initially presented as an anthropological account of mystical experiences and "non-ordinary reality," it later faced significant scholarly scrutiny, with a consensus eventually emerging that the works were largely fictional. Nevertheless, the book's influence on the counterculture of the era and its role in popularizing themes of modern esotericism remain well-documented.12