From the announcement:
Fantasy Flight Games is proud to announce Realms of Terrinoth, a new sourcebook for the Genesys Roleplaying System! You can pre-order your copy today from your local retailer or our website!
Realms of Terrinoth explores the world of Mennara featured in Runewars Miniatures Game, Legacy of Dragonholt, Descent: Journeys in the Dark, and Runebound. As a fantasy campaign setting for your games of Genesys, Realms of Terrinoth also features many races, weapons, gear, careers, and more—all of which can be found in the world of Terrinoth and expanded to any fantasy setting you create as the Game Master.