Corona SDK is a good choice to rapidly prototype and develop cross-platform mobile electronic games. As one of only a few titles on the subject, this book provides a solid foundation for new developers, even if they don't have experience with Corona or the Lua programming language. Unfortunately, as others have mentioned, the formatting of the Kindle electronic version of this book makes it difficult to follow at times, especially through long code examples.
As I already had some experience with Corona, I have not read the book cover-to-cover, but have found several chapters quite useful. The author uses a rather informal style that I expect many beginners will appreciate. At times, I personally found it awkward, and some example code is repetitive. As with many technology subjects, this product is changing rapidly, leaving some techniques in this book outdated. Still, for the target audience, beginning game developers, Corona SDK is an excellent choice, and this book provides a good introduction to get them up to speed.