The Yellow King Roleplaying Game. The core game. Four books in 6" x 9" format, grouped together in a gorgeous slipcase: Paris, The Wars, Aftermath, and This Is Normal Now. Core rules appear in the Paris book, with brief setting-specific rules sections in the other three. The beautiful and ingenious slipcase includes a GM screen. Although dabblers can get just a PDF of Paris book by pledging at the introductory Dauber tier, the four books are not sold separately. When you purchase The Yellow King Roleplaying Game, you get the complete set of four.