jQuery Mobile is a library that allows you to develop mobile apps using jQuery. Is even possible to use a jQuery Mobile program as a native app, thanks to programs like PhoneGap.
I really liked this book since it says what to do and what not to do for each of the ten sections. Also it has hundreds of images that will help you through the learning process.
I would suggest this book to everyone who is interested into developing a cross-platform app or a mobile website.
Disclaimer: I received a free electronic copy of this book as part of the O’Reilly Blogger Program