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At PDC we're often asked for recommendations on reading material for independent study. Most such questions fall into one of the areas below. While we don't officially recommend any book or other source, the lists below contain books we know of, some of which we are familiar with; where appropriate, brief descriptions are included, along with comments on their usefulness. Users are invited to submit their own reviews, by email to We will review each suggestion carefully, and consider it for inclusion below.