This supplement contains new material for use with the EarthAD.2 Core PDF, including new character stocks, gimmicks, transports, templates, and regions focusing on the Underseas. Two connected scenarios are also included. Portray Evolved Cetaceans, Crustaceans, Cephalopods, and Testudines, as well as Piscean Mutants and more.
From PDF title page:
This book contains new material for use with EarthAD 2, as well as two connected scenarios, new templates, random encounter tables, and an additional reference page.