If you have enjoyed Timothy Egan's previous book, you will like this one too. It is a fascinating story about an Irishman who comes to New York City, fights in the Civil War, and goes to Montana.
I would recommend this book to any history lover.

None of us had even heard of this Irish Revolutionary who was banished from Ireland to Tasmania for orating against British rule. He escaped and came to America, led his fellow Irishmen in the "Irish Brigade" during the Civil War and eventually became Governor of Montana. He did all that by the time he was 41, when he died under suspect circumstances in Montana. Long read, you can't miss a paragraph as there is so much information.