Creating the Booklet allowed me to have a second version of the illustrations, but I felt that they were to gloomy for a booklet about traveling to the city. Yet I do like the outcomes but I don't think the Inverted look would be appropriate for advertising a city for travelers. 
Inverted London
Published:

Inverted London

Having experimented with the illustrations from the booklet of the Hidden London Project here are outcomes I've created for an Inverted Booklet

Published: