https://www.sageadvice.eu/2019/02/08/re ... g-dd-book/Sailors!
Master Kate&Nathan revealed these preview pages are an updated version of U3 The Final Enemy, the last module of the Saltmarsh trilogy that you can already download on dmsguild as a bundle!
Not sure how to interpret this post at Sageadvice. Is this the nautical book they were talking about? A 5E verison of the Saltmarsh Trilogy?
-Havard