Magic books vanish...

I put these five vintage conjuring books on display, hardly expecting them to get much interest. Within a few days, they'd all been sold! I wasn't in the shop for those days, so I don't know who bought them - probably one person bought the lot.

There's always a doubt when this sort of thing happens... the question is whether to acquire lots more similar books and add them into stock, and whether that same person will never visit again and the books will sit there for ever.... dilemma!