"Saving Yellowstone: Exploration and Preservation in Reconstruction America" by Megan Kate Nelson is a trade paperback book published by Scribner in 2023. This biography and history book delves into the exploration and preservation of Yellowstone during the 19th century, focusing on the Civil War period. The book, with a total of 320 pages, offers insights into the lives of environmentalists and naturalists during this significant time in American history.