I would have to agree that Foyles and Books, etc. offer a far wider choice of books than one's local bookshop. However, for a really vast selection of books, I would also recommend Amazon.co.uk. Not only as I have said, do they offer such a fantastic selection, they also offer reduced prices. Going back to Chener Books, then, I feel that for a "local" bookshop, their supply is more than adequate, but it depends on what one is looking for.