Now, I'm assuming that you're reading on because you expect to enjoy the Nashville Public Library and the Frist Center for the Arts and this is shaping up to be your family's kind of day. You may be exhausted by now, and if so, that's understandable. Stop while you're ahead! If you think your family digs the literary and the arts, and can handle one more stop, I suggest McKay. You may want to snag dinner or a snack before you go, though, because we always stay there longer than I intend.
As their sign states, Nashville's McKay location is a giant warehouse full of used books, CDs, DVDs, and more. It's a book lover's dream. They seem to have a little--or a lot--of everything, including homeschooling curriculum. It's well organized, it's well staffed, and, in my experience, the prices are right.
Not only can you buy books here--and we never leave without a bag full--but you can also sell books here. So if you're planning ahead, toss a bag or two (or more) of books that your family has finished or outgrown into the car and stop by the selling/trading counter before you go any farther into the store. After they assess the books you brought, you'll have the option of cash or a trade credit. The trade credit will be worth more, and you don't have to use it that day for it to remain valid. If you're interested in selling or trading, their policies are listed on their website.
We've purchased everything at McKay from children's literature to auto mechanic manuals to math workbooks to comics to devotionals to board games. I find it hard to imagine anyone walking out of there empty-handed!
Enjoy your time there as you wrap up your day trip to Nashville!