Racey title!
I do like that book a lot. There is a sequel but it's quite different.'A Canticle for Leibowitz' (1959) by Walter m Miller Jr
Just finished 'the book of swords' by Fred Saberhagen. On with three others now: 'A Canticle for Leibowitz' (1959) by Walter m Miller Jr, 'The Once and Future King' by TH White (1958) and 'The Left Hand of Darkness' (1969) by Ursula K Le Guin.