Biography anyone?

I am hosting book club next month and have decided that rather than choose a specific book for everyone to read, each person can read a biography of their choosing.  I thought it would be fun to do something different -- the problem is I have no idea what biography I'm going to read.  So I'm asking you -- have your read a great biography?  If you were to read a biography, what would you read?  

And just FYI - an update on our water softener.  I tracked down the phone number of the people who installed it and called them.  When I told her that someone else told us we would just have to replace it, she said "Well if you already have a water softener, let's just fix it."  So, it still wasn't an inexpensive fix, but it was MUCH cheaper that a new $1500 water softener! Hooray!  It's been a few weeks and nobody is sick, so I guess we're algae-free.  And let me just say it's doing good things for my skin.  Some days I don't even use lotion once and my knuckles still aren't bleeding.  Lotion several times a day used to be the norm.  Nice!