LeapingShark said:Challenge of Champions (there are now 5 in the series) is the paragon of puzzle adventures. And Gorgoldand's Gauntlet is one of my favorite low-level adventures, stocked with plenty of puzzles and unique encounters. All are by Jonathan Richards, published in Dungeon magazine.
Another vote for Gorgoldand's Gauntlet. Very good stuff, imho.
Asmo