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      Gumroad Library

      Download from the App Store or text yourself a link to the app

      Der-shing Helmer

      This is my little storefront for my books, tutorials, and other things...
      I ship orders every Monday and Friday :]

      NOTE: Shipments will be delayed slightly on the week of March 09,
      due to a family emergency. Shipments will resume when I return on March 16.

      Thank you very much for looking!