I'm afraid I can't tell you the author of 'the last green valley novel'. It could be a relatively unknown author or a new release that hasn't gained wide - spread recognition yet. You may need to do some research, like checking with literary agents or book clubs that focus on new or niche literature.
I'm not sure specifically as I haven't read it in detail. But generally, it might be about a valley that has some sort of unique significance, perhaps related to nature, the environment, or the people living there.
The novel 'How Green Was My Valley' presents a vivid portrait of a Welsh mining community and the life of a family within it. It focuses on the challenges and joys of the characters, their relationships, and the changing times.