Well, the 'LA Weekly Best LA Novels' could be a curated list of fictional works. They probably showcase different aspects of Los Angeles like its diverse neighborhoods, the entertainment industry's influence, or the complex social fabric. It could be that these novels are chosen based on their writing quality, how well they portray the city, and their ability to engage readers with LA - based stories.
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.