SUITE 605 it's a book edited by SmartBook about a room in the off-shore island of Madeira (PT) where thousands of companies have the official address for (no) tax purposes only. Just to mention some of the most recognisable:
PepsiCo
Dell
Swatch
American British Tobacco
Independently of working or not in the tax field, I would recommend everyone a look at a book that rises big questions about the worldwide off-shores.