The Hopi, who occupy an area in the high desert plateaus of the Southwest,
are one of the best known Native American tribes.
They have a rich mythological cycle about their
ascent from a world deep inside the earth.
Traditions of the Hopi
by H.R. Voth,
Field Columbian Museum Anthropogical Publication Vol. VIII. .
A treasure trove of Hopi myth and legend.
Truth of a Hopi
by Edmund Nequatewa, 
Hopi myth, legend, and history, written by a Hopi, from a Hopi viewpoint.
If you are interested in the Hopi and their spiritual traditions,
you may also be interested in this book:
Book of the Hopi by Frank Waters