The orangey-red Betty Crocker cookbook. I think it was from the late 60's or early 70's. It had the BEST recipes (I made my first yeast doughnuts using it, as well as cinnamonbread and Stollenbread).
Oh and Euclid's "Elements" and Alexander Key's "the Forgotten Door".
First off, I just love Dawkins. My favorite two are "The God Delusion" and "The Greatest Show On Earth" (evolution). He really is a gifted writer. If I could make one suggestion though, listen to a couple of his speeches first. You can find them for free on both youtube and Itunes. He is a marvelous speaker and writes the way he talks and now whenever I read him I hear it in his voice and, for myself anyway, it enhances the experience. In fact if you are a new atheist "The God Delusion ought to be required reading along with "The End of Faith" by Sam Harris.
If you have never read anything by Bertrand Russell I strongly recommend it. Try starting with a collection of his essays and speeches. I needed smallish doses before I really got into him. "Why I Am Not A Christian and Other Essays on Religion and Related Subjects" is a good collection to start out with.