I read that book and remember LBJ’s secretary was named Mary Rather. I always wondered if she was kin to Dan.
I don’t think so. In his entry on Wikipedia no other sibling is mentioned.
LBJ life, written so far in 3 books, I believe will end with the 4th about his presidential years. Caro dedicates about 10 years of research and writing to each book and he is not young himself.
In the first book there is a fascinating chapter on the Texas Hill Country life, his description is so vivid you are totally transported in that time.
I am interested in reading about LBJ because it is part of the political history I did not know as I was raised in Europe.