- * Gamma, Helm, Johnson, Vlissides: Design Patterns. Elements of Reusable Object-Oriented Software. Addison-Wesley 1994, ISBN-13 978-0201633610
- * Bryan Lee O'Malley: Scott Pilgrim (for example, [this](http://www.amazon.de/Scott-Pilgrim-Boxed-Set-Poster/dp/1934964573/?tag=aflattrcom506-21) 6 Volume Set)
- * Jeffrey Friedl: Mastering Regular Expressions. O'Reilly 1997, ISBN 1-56592-257-3
+(ordered by preference, no e-books with restrictive DRM please.)
+
+ * Karl Popper: Logik der Forschung.
+ * Bill Bryson: The Mother Tongue. ISBN: 0-380-71543-0
+ * Raymond Chen: The Old New Thing: Practical Development Throughout the Evolution of Windows. ISBN-13: 978-0321440303
+ * Stephen Coles: The Anatomy of Type, Harper Design, US, ISBN-13: 978-0062203120
+ * more “Discworld” novels by Terry Prattchet (R.I.P.), in English or German
+ * already got “Mort”, “Guards! Guards!”, “The Color of Magic”, “The Light Fantastic”, “Hogfather”
+ * based on that, refer to the [Discworld Reading Order Guides](http://www.lspace.org/books/reading-order-guides/) for your optimal choice
+ * Michael E. Gerber: The E-Myth Revisited. HarperCollins 1995, ISBN-13: 978-0887307287