This supplement for GURPS Traveller covers the Imperial nobility, and the background for an interstellar fuedalistic govenment system. The book explains the historic basis for fuedalism, various systems of nobility that have existed in the Traveller timeline, and the current state of the Imperial system. The book is well written, adequately illustrated (SJG standard), and is a good overall description of what most players and GM's will need to incorporate nobles into their campaign worlds.
Tantalisingly, some specific details of administration at the subsector level (some contraditcting previous Traveller material), missing bio's on the Empress Iolanthe and others, and more description of the Rule Of Man and Cleon's Campaign are not present. These are my only beefs with an otherwise good supplement.