Special discount for "Drupal for Designers" if you already own three books, from which this new one is compiled from

If "Drupal for Designers" is a compilation of "Planning Drupal Projects", "Design and Prototyping for Drupal" and "Drupal Development Tricks for Designers" with some added material, is there some chance to get some special discount, if I already have all these three books and I'm just curious about this added material? :-) And of course I mean ebooks...
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