This is the last book in the Pythagoras In The Corner trilogy, and we can now look at the complete picture. Throughout these volumes, we have considered the basic elements of construction, and now we consider both domestic and commercial architecture throughout London. The reader will also find out how town and cities evolve, throughout the entire world. There are planned towns, and even abandoned towns which have a fascinating history. There is a whole section on communication. The themes include written, unwritten, verbal and visual communication. There will be a wealth of information for the reader to enjoy, and all themes covered in previous books will be examined in detail. The writer hopes that the reader enjoys the journey.