This Immortal

I read this long ago in my youth, but I found that I remembered very little on re-reading it.
Good story, somewhat surrealistic but with lots of action and a nice mystery to resolve.
Zelazny was a real craftsman with words. As I read this book, at times I felt like he was channeling Delany. Not surprising I suppose as they were contemporaries and must have influenced each other back in the 1960s.