I'm preparing my own version of the Starstone Test for 16th level characters. My problem is, I imagine some really complex puzzles and traps being a part of it, and I basically stink at those things. Any suggestions for good sources of interesting puzzles and traps to throw at high level players?
Grimtooth's traps don't have all the mechanics in them (generally system independant), but give you an idea, and odds as these are old books hard to find in paperback.
There is a d20 book of Grimtooth's traps. The book has gotten good reviews as a "best of" the old traps set for a d20 world. I think it also has optional rules for new trap features.
Got it on my wish list...