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Contributing author on Plan 9 From Halloween, Blood and Badges, The River Terror, and Dead Leaves Fall. All of which are monograph books resulting from Chaosium's annual adventure contests for both Call of Cthulhu and BRP. Jon also wrote a short Call of Cthulhu adventure as a follow-up to The Haunting, (the core adventure in all editions of the Call of Cthulhu rules), titled The Haunted. Jon also wrote a solo choose-your-own-adventure for Call of Cthulhu that was published in Protodimension #9, titled The Lonely Road.

He is JonHook on RPGGeek.

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