Complex sentence: "GURPS Mysteries" is a source book for the GURPS Role-playing game is an online PDF and POD release that covers creating and running "mystery" based adventures and campaigns, crime scenes, and advanced rules for questioning and interrogating NPCs.
Split into simpler sentences: GURPS Mysteries is a source book for the GURPS Role-playing game. It is an online PDF and POD release that covers creating and running "mystery" based adventures and campaigns, crime scenes, and advanced rules for questioning and interrogating NPCs.