The first expansion for the of the Aeronautica Imperialis, an aircraft miniatures game set in the Warhammer 40,000 universe. It is a 128 page hardcover book that expands the game and features new aircraft, scenarios and rules. It also includes hobby material, a variant campaign system and a new campaign narrative on the Typha-IV conflict, depicting a desperate air war fought between the Imperium and the Tau Empire.