From publisher blurb:
Welcome traveler!
This guide contains all the information a player needs to orient themselves to the Aventyr campaign setting and to the Rise of the Drow series of adventures, whether the game begins on the surface in Rybalka or in the Underworld.
The adventure focuses on thwarting a drow war of aggression, but the book itself contains the tools to run a sandbox-style campaign in the Underworld, particularly focused around Embla, Holoth, and the Fungi Forest.
Exploring the Underworld—itself a dangerous prospect—allows the GM to introduce any number of unique locations. To get the most out of a campaign of this style, your GM may decide to include optional resources to accompany this guide: Underworld Races & Classes, and Occult Secrets of the Underworld, but these books are not required to enjoy Rise of the Drow.
Included in the Rise of the Drow: Campaign Primer:
Pregenerated characters for 5th Edition and Pathfinder 1e
Map of Rybalka, Heart of the Frontier
Upperworld Races
Underworld Races
Underworld Cities
Deities of Aventyr
RotDCE Character Sheets