I found this site to be pretty cool and useful. Being able to type in key words and to find a long listing of books, and to further filter the results is extra helpful. I found a few coaching volleyball books I'd heard about and one I never have but am interested in reading and added it to my catalog.
I did find a book by entering physical education as the key word I never thought about looking. It was jobs for physical education majors. That is a book I'm going to order so I can read.
In the future, if and when I'm looking for additional resources I'm going to use this site. When I did my last graduate degree, having a search like this would have been helpful in finding additional resources.