This is something Dad needs to do : create a wishlist at amazon.com For example, check out my list (note that this is not a hint for Christmas gifts). Go to amazon.com, hover your mouse over the Find Gifts button and type in my email in the Find someone's wishlist box.
Just search for books you're interested in, click on the "add to my wishlist" button for each book, and you're done -- and now other people can easily get things for you ..

Just an idea.