Charlbury Library

The mysterious and quirky door promises a world of magic and mystery but fails to deliver. A moderate selection of books but no ancient texts that reveal how to open a portal to the dimension of the Ancient Ones (looks like you'd have to go to Chipping Norton for that).
There's a photocopier and if you present an Amulet of the Flagellants of Ng'tharla-Hazir, staff will photocopy your soul.
There are also computers, internet access and a printer.

Perhaps insignificant on the scale of the al-Qarawiyyin or British Library. But I do enjoy an afternoon with my children, a read and a cake.

Easy access and friendly staff.