An interesting book by a military historian on the white supremacism of the confederacy in the US Civil War

I'm currently reading an interesting book by a reformed "southern gentleman" on the white supremacism of the confederate rebellion in the US Civil War. An indication of the quality of the book is the following quotation: 

"We find it hard to confront our past because it’s so ugly, but the alternative to ignoring our racist history is creating a racist future." 

The book is "Robert E. Lee and Me: A Southerner's Reckoning with the Myth of the Lost Cause" by Ty Seidule. 

I recommend it.