This looks interesting: Imperfect Union: How Jessie and John Frémont Mapped the West, Invented Celebrity, and Helped Cause the Civil War by Steve Inskeep.
NPR has an interview with the author.
Sale
Imperfect Union: How Jessie and John Frémont Mapped the West, Invented Celebrity, and Helped Cause the Civil War
- Hardcover Book
- Inskeep, Steve (Author)
- English (Publication Language)
- 480 Pages - 01/14/2020 (Publication Date) - Penguin Press (Publisher)