Identifying the text isn't that hard, generally 10+ word excerpts pasted into Google will give you a source. The reviews/summaries though... for books you have amazon and good reads, for short stories though I don't know where you would find them. The search: '"no advantages" review alice munro' for instance only turns up material related to the collection that it is a part of, not for the story.

btw, I'm kind of just brainstorming now.