Reddit reviews The War of the Copper Kings: Greed, Power, and Politics

Any book you pick up is going to be good, but my favorite reads are Butte specific, since Butte played an outsized role in the early history of the state and everything that happened in Butte was big for the time.

War of the Copper Kings by C.B. Glasscock is about how the three Copper Kings ran mini-enclaves and controlled the government and courts of the state, waged literal wars underground, and the labor and corporate battles that played out for 40 years before Anaconda won the pot.

Fire and Brimstone by Michael Punke which covers the deadliest hard-rock mining disaster in US history, in which 167 men lost their lives. It's very well written and researched.

I haven't read this one yet and while it may not be up your alley, The City That Ate Itself by Brian James Leech is a more recent history of Butte and covers the social and economic impact of open-pit hard-rock mining on the community it consumes.

I hope you read some of these and enjoy them!