There are dozens of natural horsemanship type trainers now,and even more books/videos,and you will be spinning by the time everyone recommends their personal favorites.We do not have any of the western riding type books,as we are gaited/trail riders,but the principles of beginning riding are the same everywhere.

I really like the books that are put out by Western Horseman magazine.You can find these often at your larger farm/equine supply stores.I think there are several excellent western riding books in that series.Someone on here that rides English and does jumpers can answer better for your daughter's book/video needs probably.

Try some of this guy's:

http://marvwalker.com/

Can be long winded and a little boring, but he knows his stuff.