Tinker, Spacer, Psion, Spy details over eighteen careers specifically for use in the Twilight Sector Campaign Setting but easily adaptable for any Mongoose Traveller game. More than just a careers book it also includes details on the latest in cyberware out of the Oster Republic called CyrgeWare. We get a look at Powered armor and Twilight variant Psionics. In addition the book is filled with options to personalize your character: Pre-adult Career Paths, Life Event charts, Extended Basic Training Skill Packages, Rules and Tips for Longevity and Alternate Injury Tables. All that and charts and tables for creating worlds specific to The Twilight Sector make this book a must have.