This is Guy Fullerton's company that produces modules compatible with AD&D 1st Edition. Their lead product is "The Fane of the Poisoned Prophecies."
From Publisher's website:
"Chaotic Henchmen Productions aims to provide high-quality, well-written, great-looking products that support our favorite roleplaying games from an older era.
Our products include a healthy amount of old-school design sensibility (both mechanically and visually), but we use a slightly more modern layout, which makes our products easier to use than their vintage counterparts.
Chaotic Henchmen Productions is excited to be a small part of the growing retro/old-school roleplaying game community."