From the introduction:
Welcome to Bureau 13: Stalking the Night Fantastic. I remember playing this game way back in 1983. I loved the setting, after all, who doesn’t love hunting down evil supernatural entities and destroying them! I hated the rules. Now, with the release of Savage Worlds, we have the perfect RPG system in which to explore the awesome Bureau 13 background. As they stand, the Savage Worlds rules fit the setting almost perfectly- any "tweaks" are mentioned in the text and the Rules of the Game section that follow. This supplement provides enough information with which to start a Bureau 13 campaign- expanding and adapting it beyond this is left to the creativity of the individual GM.