The PPC Holiday Songbook is a compilation of filk by PPC Boarders, hosted with their permission by Neshomeh on her website. Each year, sometime in December, the PPC Holiday Filk Game is held, and the entries are then added to the Songbook. PPC-style filks have been written practically since the Board was founded, but the tradition of a Board-wide annual filk-writing game began in 2006 (or possibly 2005 or earlier—Neshomeh isn't sure anymore). After 2006, Neshomeh decided it would be fun to keep doing it, and has kept it up ever since.