Inc. ProcessTree Network TM Amazon.
Programming is the same way.
You must actually run some programs in order to really understand the concepts. Perl 5 by Example teaches you how to use the Perl programming language by showing examples that demonstrate the concepts being discussed. The examples are designed to give you a chance to experiment-which in turn should clarify the material. The topics are covered in a straightforward, non-technical manner which allows you to quickly understand the fundamental principles. After the main topic of each chapter is introduced, sub-topics are explored in their own sections.