This book gives you the information you need to delve deeper into your Eberron story or character. It includes an expansive deep dive of Khorvaire from the Demon Wastes to the coasts of the Lhazaar Principalities, and a plethora of intrigue and noir story hooks in between.
The purpose of this book is to provide you with additional rules and character options that let you delve deeper into the world: new subclasses & races, racial feats, new forms of dragonmarks, and more. It also provides you with the lore you need to build a deeper character and story. While this is presented in a player-focused way, these ideas should inspire DMs, as well as players. Even if no one at your table creates a barbarian or druid character, the information about the Druidic sects of the Eldeen Reaches or the concept of the supersoldier barbarians of House Vadalis could be the seedlings of a story yearning to develop its maturity.