The Triangle is a pack of three missions for FIST, themed around the Bermuda Triangle.
The PDF is 39 pages, mostly image free but with a lot of variety in the text color. It's cleanly organized and easy to read.
Contents-wise, the missions are detailed, weird, and interesting. The first involves crawling the dreams of a predictive AI, the second hitting an entrenched position of vampires, and the third recovering an orbital-dropped dragon. Each of these missions comes with new enemies, new traits, and unique custom mechanics on top of a dynamic tactical situation. There's a fair bit to familiarize yourself with as the GM, but it's worth it.
The writing in Triangle is clear and clever, and the game balance feels extremely grounded. There's an undercurrent of humor that runs through it all and helps make it very approachable.
Overall, if you want three extremely complete, mechanically solid missions for FIST, this is a great place to get them. It's probably also a perfect starter pack for GMs who've just begun to dip their toes into the third party scene.
Minor Issues:
-Page 25, roll of a 6, it might be more interesting to have a 6 mean choose two