If you couldn’t wait yesterday and ran out to get an iPad first thing when they went on sale then i have a special treat for you. You can get The Yosemite by John Muir or The Indians of Yosemite by Galen Clark free from iBooks.
Simply download the iBooks app then go to the bookstore. If you do a search for “Yosemite” you’ll see both books are available free for your iPad from Project Gutenberg.
If you’ve never read the books they’re a great look at Yosemite when the first settlers were entering the park, a far cry from today’s chaos.