Ever since finishing them, I have been on the hunt for historical biographies of similar quality. While I haven't found any that match up completely, here are a few that come close in my opinion:
* Truman by David McCullough
* Grant by Ron Chernow
* American Caesar by William Manchester
I've also read the three-part Churchill series by Manchester, but it didn’t quite measure up to the LBJ series for me.
If you have any other suggestions, please share them!
My brother in law loves Vonnegut, I read all of his books also. Personally, I don't understand the appeal