I read this a few years ago and loved it. A UK publisher brought out a collection of his short fiction (entitled 'Dark Benedictions' IIRC) not long after I read Canticle, so I got that and read it. Unfortunately, I didn't think much of most of the stories, which felt badly dated in the main (unlike the novel).
I remember thinking it strange that the novel seemed to contain a strong anti-suicide message, yet Miller ended up killing himself. Odd...