The month of July is pretty much the best month of 2012 to find Free eBooks for Young Adults (and any other eBooks). That's because Smashwords is holding their annual Summer / Winter sale (the winter part is for our friends 'down under').
I've priced all of my books free for this special sale, including my most popular Playing the Baseball Card and Sons and Brothers in Seattle, so go ahead and get my books free, or find something else to fill your reading device. Smashwords' eBooks are available in all formats, for Kindle, Nook, Kobo, Android app for Tab or smartphone; it's all available for almost every book on Smashwords. But, this is a limited time offer, and it ends on July 31st, so don't delay.
And one more thing... on Smashwords, there's no worry about region, or country, or location when you get these books for free. Unlike Amazon, or Apple, or most of the others, you 'purchase' these free Smashwords books anywhere.
Enjoy your summer (or winter), and happy reading!