From the back of the book:
"In the 26th Century, Alexander Davion wanted the Federated Suns to be the last to join the Star League. In the 31st Century, Hanse Davion wants them to be the last to survive it.
Hanse Davion, dynamic First Prince of the Federated Suns, rules the largest and most powerful of the five Successor States of the Inner Sphere. After two and a half centuries of devastating interstellar warfare, the Inner Sphere is poised on the brink of a new age, as signaled by the recent alliance between Davion and House Steiner's Lyran Commonwealth. The Davions and Steiners have powerful enemies, though, all of whom have grouped together in a desperate attempt to prevent an irretrievable tile in the balance of power...
This ComStar casebook covers the history of the Federated Suns and its ruling family, its military forces, government, economy, culture and daily life, along with dozens of full-color illustrations. Also included are unit deployment charts, dossiers on prominent individuals, an atlas of key Federation planets, and much, much more."