This book presents the Outremer Subsector, located on the extreme edge of Commonality Space. It's the setting of the adventure Dominion and much of the material here is in the Traveller version of the Mingjammer rules, but it's now been completely rewritten for those using the original Fate system rules.
Situated on the edge of Commonality Space, Outremer straddles several interstellar political regions and contains unaligned and unclaimed planetary systems as well. If you think you'd like to set your game here, in these pages you will find detailed planet and star system details for the Heritage Contestation, octant zeta of the subsector, including planetary maps, and more outline material on the rest of the subsector - so plenty of space to add the elements you fancy.
First off, some history of the region. Like much of the rim, planets here were colonised long ago in earlier diasporas, but contact was re-established some 130 years ago just before contact was made with the Venu. Indeed many battles in the war with the Venu occurred here, and the situation is still tense with violence flaring up occasionally.
Maps in the endpapers show all eight octants with political markings, and the various groupings planets can belong to are discussed next. Some are friendly towards the Commonality, others hostile or at best undecided; and of course there is an unclaimed region as well. Plenty of xenomorphs and even plant-based intelligences are to be found (and yes, the necessary information to play one of the latter as a character is included). Details of the natures of each group are provided, to aid in the development of individuals and the overall look and feel of each one.
The discussion then moves on to the economy of the area which, quite frankly, is a mess. It is chaotic with various factions trying to exert control be it for themselves or for the common good. Various economic systems are to be found and it can be fun when those accustomed to one suddenly find themselves in a completely different one. Then we meet other groups: the corporacies. Several are detailed, there's even the suggestion that the party might like to hire out to one or even set up one of their own. Technology and space travel round out this chapter.
Next is Chapter 2, which goes into more detail about the Heritage Contestation octant. It bore the brunt of the fighting during the recent unpleasantness with the Venu and as a result has aquired the nickname 'The Anvil'. There is a detailed map, including an anomaly called the Hammer - space is unstable there, possibly due to the presence of a black hole. Notes - and maps - of individual worlds are provided, excellent if the party wishes to travel in this region. It's a wonderful gazetteer whether you are looking for just the right planet for the adventure you have in mind or if you want to go exploring.
This is all setting material - magnificent setting material. You may find that reading through it spawns some plot ideas, or you may want to run a game that involves exploring or trading... or even a diplomatic mission. However, whilst providing you with a well thought out setting, the adventures will have to come from you.