From publisher blurb:
Swan maidens, fairy tales, and past-life adventures.
Animal Races: Clan of the Swan introduces a playable race of avian shapechangers with ties to the realm of the fey. Born from the fires of the first Phoenix and the primordial magic of fairy-kind, members of the Swan Clans undergo a process of continuous reincarnation that has carried their ancient souls forward from a long-forgotten past into the present day world.
In addition to the rules you need to play Swan Clan shapechangers in modern times, this book includes guidelines for past-life adventures, allowing your character to relive memories from past lives to learn about bygone eras or to extrapolate historical trends into the future.
Whether you want to play a bird-themed shapechanger with ties to the fey or want advice for incorporating an in-character flashback to ancient times into your campaign, this PDF is for you.