U1-2-3: Saltmarsh Trilogy
The Saltmarsh Trilogy comprises U1: The Sinister Secret of Saltmarsh, U2: Danger at Dunwater, and U3: The Terrible Title aka Final Enemy. These were released annually 1981-3. "U" stands for "United Kingdom," as they were designed by TSR UK, a short-lived branch that went on to form their own thing that you might maybe know about. All three are credited to "Dave Browne with Don Turnbull" - why the preposition, maybe some Limey thing.
Anyway the series was all deemed good at the time. 2e interpolated an adventure between U2 and U3; then 3e added sequels. These all got translated to 5e and fleshed out, and competently. So competently, we're not going to spoil it all here for a change. Refer to Ghosts of Saltmarsh.
U1: The Sinister Secret of Saltmarsh[edit | edit source]
This book is divided into two main portions with the major focus of the module being what amounts to a haunted house.
U2: Danger at Dunwater[edit | edit source]
Lizardmen being getting riled up and ready to attack the town and the party has to try and stop them.
U3: The Final Enemy[edit | edit source]
You face down the final enemy. Notable for being largely underwater.