Details:
I'm stumped for an idea of what to get my buddy's wife and daughter that they can both enjoy together. The daughter is 13, both she and her mom like to read. We agreed to do 'kids only' gift exchange this year, but the game I got their son is something he'll likely play with Dad....so I want to be fair. I don't like the idea of a gift card to a bookstore, because gift-cards always seem to me like a thoughtless, no-effort gift (not that I mind getting them!).
Any ideas appreciated, all decent answers rated generously by me.