Waterstones in Picadilly in London is in a 90,000 sq ft building, but I'm not sure if all of it is used for the book store (abd even within the book store I gue

Waterstones in Picadilly in London is in a 90,000 sq ft building, but I'm not sure if all of it is used for the book store (abd even within the book store I guess it depends if you count onky public spaces, and if you include thr cafes etc.. They claim 200k titles.