"Winged Arrow's Medicine; Or, The Massacre at Fort Phil Kearney" by Harry Castlemon, is a story set in the American West in the 19th century. It tells of Guy Preston, a young cavalry officer at Fort Phil Kearney, during a dangerous time of conflict with the Sioux Indians, led by Red Cloud. While hunting, Guy meets a Sioux youth named Winged Arrow, who speaks English and warns him of a planned attack on the fort, where soldiers are in danger. The book shows the troubles of frontier life, the clash between settlers and Native Americans, and the growing tension that leads to violence, driven by broken promises and lost lands.

Winged Arrow's Medicine; Or, The Massacre at Fort Phil Kearney
By Harry Castlemon
Amidst growing tensions between settlers and Native Americans, a young officer receives a chilling warning that could mean life or death for everyone at Fort Phil Kearney.
Summary
About the AuthorCharles Austin Fosdick, better known by his nom de plume Harry Castlemon, was a prolific writer of juvenile stories and novels, intended mainly for boys. He was born in Randolph, New York, and received a high school diploma from Central High School in Buffalo, New York. He served in the Union Navy from 1862 to 1865, during the American Civil War, acting as the receiver and superintendent of coal for the Mississippi River Squadron. Fosdick had begun to write as a teenager, and drew on his experiences serving in the Navy in such early novels as Frank on a Gunboat (1864) and Frank on the Lower Mississippi (1867). He soon became the most-read author for boys in the post-Civil War era, the golden age of children's literature.
Charles Austin Fosdick, better known by his nom de plume Harry Castlemon, was a prolific writer of juvenile stories and novels, intended mainly for boys. He was born in Randolph, New York, and received a high school diploma from Central High School in Buffalo, New York. He served in the Union Navy from 1862 to 1865, during the American Civil War, acting as the receiver and superintendent of coal for the Mississippi River Squadron. Fosdick had begun to write as a teenager, and drew on his experiences serving in the Navy in such early novels as Frank on a Gunboat (1864) and Frank on the Lower Mississippi (1867). He soon became the most-read author for boys in the post-Civil War era, the golden age of children's literature.