It's an assortment of genres -- he tends to buy whatever is in good condition -- a few histories of varied planets, a western, a couple of mysteries (the cozy sort with crime-solving grandmothers who knit and make sticky rice and keep pistols in their handbags), and one that he reaches over and taps with his finger when she gets to it.
"That's an old story. I used to tell it to my daughter. About a poor lad who meets a wise princess, and she helps him do impossible tasks."