Now that I have the book, I agree with the reviewer that complained about the writing style and poor editing.
Here is an example of the mangled text found in the book:
"It is not a JavaScript array the object is an instance of the native Storage class which doesn't have constructor access to from inside the browser environment but it has array-like features, such as a length property."
Lunny, Andrew (2011-09-23). PhoneGap Beginner's Guide (p. 66). Packt Publishing. Kindle Edition.
There are many sentences like this, often several on each page, which make reading the text difficult. Yet the overall content is very valuable for learning PhoneGap. I am also learning Javascript at the same time, but using a different book for that.
As this is the only book covering PhoneGap that is available now, I do recommend the book. But I wonder why the publisher released this book before it was edited?
4 stars due to the problems with the writing mistakes and lack of editing.