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You were looking for a book on quantum mechanics? I've recently read Stephen Hawkin's The Grand Design, which is a nice introductory book, especially for people with little or no scientific background. Of course, you shouldn't expect to understand quantum mechanics after having read it, but many of the concepts (including the double-slit experiment) are explained in a very paedagogic way. It's definitely the best and most easily accessible material on quantum mechanics I've read, so I highly recommend it.