The Unofficial 3rd Edition Dungeons & Dragons Birthright Campaign Setting Conversion Manual
From the introduction:
The Birthright campaign setting allows players to explore the grand scope of national politics as they guide their domains and influence the events of Cerilia. Although discontinued, Birthright has continued to engage the imaginations of a small (but loyal) group of adherents who enjoy role-playing in the rich tapestry of Cerilia. These loyal adherents face a new difficulty with the transformation of Advanced Dungeons & Dragons (2nd Edition) into Dungeons & Dragons (3rd Edition).
This is a book for such players – a tome of information for players facing a transition to the new rules system.
This product requires the use of the standard, commercial products detailing Birthright as well as the core rules for Dungeons & Dragons (3rd Edition).