Well, in these places there are no staff in the normal sense, they're usually behind a counter taking your order, and calling you over when it comes up from the basement !

( And I doubt any of them would know much about
any of the 1,000's of products available. )
And my real point was their no-doubt expensively produced catalogue, compiled by no-doubt supposedly knowledgable marketeers, checked by (probably poorly paid ) proof-readers, displayed total ignorance of the difference between an ebook and an ereader ....
( I just thought 'twas amusing...........................