So let me take the chance to add a diff rec. Caro did 22 interviews with Horace Busby. If you like Caro you should *also* read every oral history of LBJs aides
Here are some:
lbjlibrary.net/collections/or…
lbjlibrary.net/collections/or…
Sadly, on primary documents they used to have some that now have been pulled down. If someone from library is reading this--please digitize more of them:)!
lbjlibrary.net/collections/or…
Can go to their other page Discover LBJ, which has the Rowe oral histories
discoverlbj.org/item/oh-rowej-…
discoverlbj.org/solr-search?fa…
And Rowe from Truman Library: trumanlibrary.org/oralhist/rowej…
discoverlbj.org/exhibits/show/…
Interviewing someone many times is important. But for those of us without access, I think going past biography and reading as many oral histories is very very important too.
So if you like Caro, highly recommend supplementing it with the oral histories