There are two free chapters available: chapters 13 and 16
chapter 16 covers how to connect a Laszlo application to an HTTP web server. The chapter starts with a simple example where we connect to an RSS data feed. In the example, we create a window that displays today's headlines. The code is very straightforward and consists of about 20 lines. Afterwards, we demonstrate why the superiority of using a buffered dataset approach.
Chapter 13 covers the basics of building multi-state buttons and animation. Its filled with lots of short examples that you can easily run from your browser.