The 5.2 PDF was designed to work seamlessly with The Book of Uther and The Book of Sires . You can hyperlink between documents if you have a full suite, making character creation (which spans generations) much smoother.

Given that you are searching for 5.2, you are likely aware that 6th Edition exists. Here is a blunt comparison:

is available for purchase from authorized digital retailers. Note that Chaosium generally does not release its core RPG books for free. Chaosium Official Site : You can buy the King Arthur Pendragon Core Rule Book - 5.2 Edition

Edition 5.2 is primarily a over Edition 5.1. It incorporates years of errata and minor rule corrections into a single, cohesive volume. Pendragon 6E vs. Pendragon 5.2E/Paladin/Prince Valiant

While official print runs of 5.2 are rare, the PDF often allows access to Print-on-Demand services (like DriveThruRPG’s PoD option), giving you the best of both worlds.