This is an excellent book to read if you're interested in Montana history from the 1880s to the 1930s. It has some stuff about the 1950s but not a whole lot.
It does an excellent job profiling the Alien-Sedition Act that was passed in the state around 1918 and also the turmoil surrounding the Amalgamated Copper Mining Company (later Anaconda) and their bid to control the state.
They were really able to do that through their propaganda machines, the state newspapers. This book was a real help to me when writing my fourth volume of Montana history, Hustlers and Homesteaders.
I'll also note that the author is the, I believe grandson, of one of the governors/senators he writes about, Joseph K. Toole.