Sourcebook #4: Coalition NavyWelcome to Rifts Sourcebook 4: The Coalition Navy. As the title would suggest, this is a book that describes the rise of the Coalition States as a growing power and its new Navy. This includes background details, important NPCs, character classes, ships, subs, and equipment descriptions our players would expect. Publisher Blurb: An in depth look at the burgeoning power of the Coalition Navy, its mecha, subs, ships, weapons, troops and organization.