Trail of Cthulhu Keeper's Resource Book & Screen
It's easy to get clues with GUMSHOE¸ but don't make it too easy!
"A coffee-proof screen shields mysteries best unseen by prying eyes. On the Keeper side are essential Trail of Cthulhu tables to lessen wear on your prized copy of Trail of Cthulhu.
"Included is chunky resource book for use in play - it includes clues¸ equipment¸ background info and special benefits on abilities and occupations¸ as well as 50 NPCs ranging from suave cultists to talkative telephone operators.