Memory modules, Part 2

Crashing outta 1981 like a mighty wave, it's "The Sinister Secret Of Saltmarsh".

We borrowed this from a woodwork/metalwork teacher (and made Xeroxes). Somehow, we discovered he had a son who was older than us, went to a different high school and was also a "D&D" maniac. Can't recall how we learnt that, but either MG or WD boldly asked if this boy we'd never met would loan us a good adventure! Which he did! At the time at our junior high, there was a system of merits and demerits which took the form of blue and red slips of paper. When we heard the teacher in question had awarded a blue to a kid who'd stayed behind to help clean the woodwork/metalwork room, we tried the same trick the next week. It didn't work. He obviously thought we'd done it out of gratitude for his son lending us "Saltmarsh". To be fair, it was a fab bit-of-everything introductory quest.