Don't get me wrong. Nothing wrong with giving Hammett his due. I like (sort of) Hammett (well actually, I don't, but he can be part of the canon.)
But seriously? If the mission of LOA is to honor America's great writers, where was Shirley Jackson? She's a writer who gets into your bones and your head. She is just a great writer.
Hers is the voice of everyday, familiar fears, the woman who crawls inside families, sisters, crazy houses made crazy by the people in them. Jackson is the voice of everyday hatred turned into evil. The world that is always about to turn dark, and unpredictable, the world teetering on itself. There are just so many fine short stories and two truly unforgettable novels -- "We Have Always Lived in the Castle" and "The Haunting of Hill House."
So celebrate and read. It's a good time to be scared.