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?

Context paragraphs:
Crazy Horse Too: Crazy Horse Too is a closed strip club located at 2476 Industrial Road in Las Vegas, Nevada, a few blocks west of the Las Vegas Strip.  The club was known as Billy Joe's during the 1970s.  In 1978, the club was purchased by Mob member Tony Albanese and renamed Billy Joe's Crazy Horse Too, after the Crazy Horse Saloon, another Las Vegas strip club owned by Albanese.  In 1984, Rick Rizzolo took over operations of the club when it was purchased by his father, Bart Rizzolo.  Rick Rizzolo was a majority owner by 1986.

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.  He was a second cousin of the war chief Crazy Horse.

Hilda Neihardt: Hilda Neihardt (1916–2004) was one of her father John G. Neihardt's "comrades in adventure," and at the age of 15 accompanied him as "official observer" to meetings with Black Elk, the Lakota holy man whose life stories were the basis for her father's book, "Black Elk Speaks" and for her own later works.

Little Hawk (Crazy Horse's brother): Little Hawk (1842-1871) is the younger half brother of the famous Oglala warrior Crazy Horse # 3 (1840- 1877).  He was the offspring of the remarriage of Worm, Crazy Horse's # 2 widowed father, to a pair of sisters of the Brulé Lakota chief Spotted Tail, Iron Between Horns and Kills Enemy.

Crazy Horse Memorial Highway: Crazy Horse Memorial Highway is the name given to two highways named in honor of Crazy Horse (circa 1850-1877), a Lakota war leader:

Little Hawk: Little Hawk (Lakota: Čhetáŋ Čík’ala) (1836–1899) was an Oglala Lakota war chief and a half-brother of Worm, father of Crazy Horse (Lakota: Tashunka-witko).

Flying Hawk: Flying Hawk (Oglala Lakota: "Čhetáŋ Kiŋyáŋ" in Standard Lakota Orthography; a/k/a Moses Flying Hawk; March 1854 – December 24, 1931) was an Oglala Lakota warrior, historian, educator and philosopher.  Flying Hawk's life chronicles the history of the Oglala Lakota people through the 19th and early 20th centuries, as he fought to deflect the worst effects of white rule; educate his people and preserve sacred Oglala Lakota land and heritage.  Chief Flying Hawk was a combatant in Red Cloud's War and in nearly all of the fights with the U.S. Army during the Great Sioux War of 1876.  He fought alongside his first cousin Crazy Horse and his brothers Kicking Bear and Black Fox II in the Battle of the Little Big Horn in 1876, and was present at the death of Crazy Horse in 1877 and the Wounded Knee Massacre of 1890.  Chief Flying Hawk was one of the five warrior cousins who sacrificed blood and flesh for Crazy Horse at the Last Sun Dance of 1877.  Chief Flying Hawk is notable in American history for his commentaries and classic accounts of the Battle of the Little Big Horn, Crazy Horse and the Wounded Knee Massacre, and of Native American warriors and statesmen from who fought to protect their families, defend the invasion of their lands and preserve their culture.  Chief Flying Hawk was probably the longest standing Wild Wester, traveling for over 30 years throughout the United States and Europe from about 1898 to about 1930.  Chief Flying Hawk was an educator and believed public education was essential to preserve Lakota culture.  He frequently visited public schools for presentations.  Chief Flying Hawk leaves a legacy of Native American philosophy and his winter count covers nearly 150 years of Lakota history.

Crow King: Crow King (in Lakota Kȟaŋǧí Yátapi), also known as Medicine Bag That Burns, Burns The Medicine Bag or simply Medicine Bag; was a Hunkpapa Sioux war chief at the time of the Battle of Little Big Horn.  Crow King was one of Sitting Bull's war chiefs at the Battle, he led eighty warriors against Custer's men on Calhoun Hill and Finley Ridge.  For the duration of the battle of Little Bighorn, Crow King and his band of eighty warriors attacked Custer from the south, allowing Crazy Horse and Gall to surround the 7th Cavalry.  Crow King died in 4-5-1884, cause of death according to the 4-11-1884 Bismarck Tribune, he died of "quick consumption" from a long lasting cold and received the rites and sacraments of the Catholic Church.  Location of his burial is unknown.

American Horse (elder): American Horse (Oglala Lakota: "Wašíčuŋ Tȟašúŋke" in Standard Lakota Orthography) (a/k/a "American Horse the Elder") (1830–September 9, 1876) was an Oglala Lakota warrior chief renowned for Spartan courage and honor.  American Horse is notable in American history as one of the principal war chiefs allied with Crazy Horse during Red Cloud's War (1866–1868) and the Battle of the Little Bighorn during the Great Sioux War of 1876-1877.  Chief American Horse was a son of Old Chief Smoke, an Oglala Lakota head chief and one of the last great Shirt Wearers, a highly prestigious Lakota warrior society.  He was a signatory to the Fort Laramie Treaty of 1868, along with his brothers Chief Red Cloud and Chief Blue Horse.  A month or so after the Treaty, American Horse was chosen a ""Ogle Tanka Un"" (Shirt Wearer, or war leader) along with Crazy Horse, Young-Man-Afraid-of-His-Horses and Man That Owns a Sword.  On September 9, 1876, American Horse was mortally wounded in the Battle of Slim Buttes fighting to protect his family and defending against the white invasion of the "“Paha Sapa“" Black Hills.

Chief Crazy Horse (film): Chief Crazy Horse is a 1955 American CinemaScope Technicolor Western film directed by George Sherman starring Victor Mature, Suzan Ball and John Lund.  The film is a fictionalized biography of the Lakota Sioux Chief Crazy Horse.  It was also known as "Valley of Fury".

Supporting paragraphs: Hilda Neihardt Black Elk
Answer: "Black Elk Speaks"