Guernsey is the second largest of the Channel Islands and is just over 30 sq miles in size with a popluation of around 65,000.  It has its own currency of Guernsey pounds (and still has a pound note) but Sterling is accepted.  

This widely accepted 'bible' of Guernsey's road network (over 300 miles of tarmac) includes a detailed map of St Peter Port and maps of Alderney, Sark and Herm with Perry's grid references and full street index.

There is also a page of Guernsey Place names and their meanings.