Somewhat in the book The Man who Loved Only Numbers[1], it's a biography of Paul Erdos who was mostly homeless and spent his life travelling around other mathematicians' homes staying with them a few days at a time, and Ron Graham did a lot of looking after him and his life, pay, bureacracy, etc, so gets quite a few mentions.
I (think I) remember a quote from that book, to the effect that Ron Graham was once asked how he could possibly be as productive as he was; his response was that there were 168 hours in the week.
[1] https://en.wikipedia.org/wiki/The_Man_Who_Loved_Only_Numbers