I just received my copy of The Mysterious Bookshop Newsletter and noticed in there, a very clever offer from my friends at this great bookstore in NYC. For 50 USD they will select twelve titles for you from their collection of hardcover golden age mysteries, published mainly between the wars. If you are interested I recommend you contact Rob , rob (at) mysteriousbookshop.com. I'm sure they have some wonderful Christie (or Christie-esque) in between.