Good news! I've created a lightly revised version of Tomb of the Serpent Kings.
With many thanks to Jacob Hurst for insightful comments and David Shugars for extremely patient editing.
There's also, for the first time ever, a Print On Demand version available through OBS. It's sold at cost. I don't make a cent off it.
This version doesn't differ significantly from past ones. References have been harmonized. There's a fancy quick reference map.
The entire dungeon is licensed under CC-BY-NC, so feel free to remix, adapt, and translate it. David's made up an Affinity Publisher file. Grab it and get hacking!