The Player's Manual (reference book)
From Tardis Wiki, the free Doctor Who reference
The Player's Manual was the first of the three books included in the original September 1985 FASA Doctor Who Role Playing Game Game Box Set, alongside Game Operations Manual and A Sourcebook for Field Agents.
It largely served as a guide for a prospective game-master on how to design original adventures, characters, monsters and so on. It also included an entire, non-role-playing short story, Tabby Cats And Time Lords, intended to serve as an example of a typical DWU adventure.