Barter Books is a second hand bookshop houses in the
former train station in the Northumberland town of Alnwick (also
famous for Alnwick Castle, or the real-life location of
Hogwarts School of Witchcraft and Wizardry).
Customers can bring in their old books in return for credit to spend
in the store. There are also multiple fireplaces and cosy chairs for
reading, along with a cafe situated in the old first-class waiting
rooms.