Question: What was the name of the book written by Hilda Neihardt's father that was based on the second cousin of the war chief Crazy Horse?
Sentence (from "Black Elk"): Heȟáka Sápa (Black Elk) (December 1, 1863 – August 19, 1950) was a famous "wičháša wakȟáŋ" (medicine man and holy man) and heyoka of the Oglala Lakota (Sioux) who lived in the present-day United States, primarily South Dakota.
Relevant evidence: No