This is an electronic book that shows the source code for an open source Smalltalk-80 system called Pharo. Pharo is based on another open source Smalltalk-80 system called Squeak, which inherits from one of Xerox Parc's original Smalltalk licenses.

The book allows you to examine the source code of a Smalltalk system by letting you view class definitions, categories, comments and the source code for every method in a Pharo image created in late April 2009.

Not only can you view the book on the device, you can share source code views to other device's internet browsers on the local WiFi network if you wish.