From publisher blurb:
Zydrek represents a sample of the upcoming Extras! line by D3 Adventures. He is a 9th level ratfolk witch working for a powerful bronze dragon. He watches for threats, listening to his adventuring clientele, and acts upon them if needed by either confronting the evil himself or fowarding the information to the Lord of Thunder for him to deal with.
To most people, however, Zydrek is a simple shopkeeper and alchemist who makes custom potions and other minor magical items. He sells to the wealthy and adventurers by day, and helps the poor by night.