It turns out that this group is doing an audit of the council's storage space. I suppose it's lucky that we'd just received this month's meagre ration of new books plus another batch of "Book Off" books for to be distributed around the schools of the borough.
If you learn nothing else today, learn this: if you ever go backstage at a bookshop or a printer's or a library, don't say: "Ooh, what a lot of books!"
And whatever you do, don't say: "I'd be spending all my time reading the books!" You won't be getting the response you'd get from the publican you accused of drinking all their stock, but you won't be expecting it!