- * Gamma, Helm, Johnson, Vlissides: Design Patterns. Elements of Reusable Object-Oriented Software. Addison-Wesley 1994, ISBN-13 978-0201633610
+(ordered by preference, no e-books until the DRM issue is gone.)
+
+ * John Scalzi: The Ghost Brigades, ISBN-13: 978-0765354068
+ * Michael Seemann: Das neue Spiel: Strategien für die Welt nach dem digitalen Kontrollverlust, ISBN: 3936086796
+ * more “Discworld” novels by Terry Prattchet, in English or German
+ * already got “Mort”, “Guards! Guards!”, “The Color of Magic”, “The Light Fantastic”
+ * based on that, refer to the [Discworld Reading Order Guides](http://www.lspace.org/books/reading-order-guides/) for your optimal choice