Agree. Lovely book.
Here's a another novel by Walter M. Miller, published posthumously: http://english.netmassimo.com/2012/02/09/saint-leibowitz-and-the-wild-horse-woman-by-walter-m-miller-jr/
Don't think it's as good as his first novel, but might be interesting?
i've heard reviews were mixed, but i'll probably check it out eventually… i have a few other things to catch up on first :)
Just ordered it, actually. :)