"Hi Jolly!" is based on the true story of Hadji Ali, a Syrian-Greek immigrant who became known as "Hi Jolly" in the United States. Hadji Ali was a camel driver hired by the U.S. Army in the mid-19th century as part of an experimental project to use camels for transportation in the American Southwest.The novel likely explores Hi Jolly's journey from his homeland to the American frontier, his experiences with the camel corps, and the challenges and adventures he faces in a foreign land. Through Hi Jolly's story, Kjelgaard probably delves into themes of cultural exchange, adaptation, and the spirit of adventure.