Coteries

Coteries is a sourcebook for the Vampire: The Requiem game line. It examines the relationships between groups of Kindred, and how they survive in their environments.

Summary
From the Onyx Path catalog:

Strange BedfellowsThe Kindred are solitary predators, yet something within compels them to seek out others of their kind. Whether formed as a social faction, a cult of heretics, a consortium of conspirators or as an exercise in safety in numbers, a coterie of Kindred is no strange thing to see after sunset. How, then, do its members reconcile their bestial urges with the demands of nightly unlife?Trust Doesn't Come EasilyCoteries examines the "family unit" of Kindred society. Broken down by sect and clan relations, this book sheds light on how groups of disparate vampires set aside their differences (or nurse grudges) to protect themselves against the hostile world in which they exist. Sometimes, only your fellow Kindred can protect you from the darkness, but trusting them to do so is a dangerous proposition in itself.