You may find this collection of bookshop exchanges amusing; please let us know if you have any gems of your own. Reversing the roles for a moment, with all due respect to bookshop sales assistants, there are occasions when they are not quite as familiar with their stock as they might be, e.g. look here.
Another good story, just by the way - an Oxford philosophy don was taken to task by a colleague on the narrowness of his reading: "your problem is that you don't read novels", "on the contrary", said the philosopher, "I read all six every year".
