Edinburgh is Scotland's capital and is the closest
big city to the FARM - the City Spies home base in Aisling. (Aisling is a fictional town I made up that is inspired by the area north of St. Andrews.)

Edinburgh is where Brooklyn first arrived in Europe
and where Rio, Paris, and Kat spied on her to see what she was like. This is also where Mother has a "cover" job with the Scottish National Gallery and where Paris goes for Chess lessons with Barnaby Fitch in Forbidden City.