You do have LiveCode, don't you?
If you haven't yet installed LiveCode, go to http://livecode.com/download and download the Community Edition for your development platform. This version is open source and free to use. You will need to provide your name and e-mail which establishes a user account for LiveCode. At the time of writing this book, you also get a free App Design Kit that includes an introductory video and a mobile app2market.livecode
template.
If you plan to buy Commercial LiveCode, read through http://www.runrev.com/store/ to understand the many variations of licenses that are there. As a rough guide, based on the price at the time of writing this book, to create mobile applications that are free, the cost would be $99, and if you want to make apps that you could charge for, the cost would be $299. Additional levels of use and support are available at extra cost.
The two editions of LiveCode have a distinctive color scheme too, with the Commercial Edition using blue elements and the Community Edition using green elements.
Once you have downloaded the Community Edition or bought one of the commercial licenses, go ahead and launch it!