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 Magazine, Issue 09, titled The Lonely Road.
Jon Hook has been responsible for several pulp adventures published by Goodman Games: Age of Cthulhu, Vol. 7: The Timeless Sands of India (Supplement), Age of Cthulhu, Vol. 8: Starfall Over the Plateau of Leng (Supplement).