My Life on the Plains. Or, Personal Experiences with Indians (1874) General George Armstrong Custer
Librivox audio book (free) here.
Elizabeth Bacon Custer (April 8, 1842 - April 4, 1933) was the wife of General George Armstrong Custer. After his death, she became an outspoken advocate for her husband's legacy through her books and lectures. After her husband’s column was wiped out at the Battle of the Little Big Horn in June 1876, many in the press, Army, and government criticized Custer for blundering into a massacre. President Ulysses S. Grant publicly blamed Custer for the disaster. Fearing that her husband was to be made a scapegoat by history, Libbie launched a one woman campaign to rehabilitate her husband's image. She began writing articles and making speaking engagements praising the glory of her martyred husband. Her three books, Boots and Saddles (1885), Tenting on the Plains (1887), and Following the Guidon (1890) were brilliant pieces of propaganda aimed at glorifying her dead husband’s memory. Her efforts were successful. The image of a steely Custer leading his men against overwhelming odds only to be wiped out while defending their position to the last man became as much a part of American lore as the Alamo. (Wikipedia)
Boots and Saddles; or, Life in Dakota with General Custer (1885)