From the introduction to the book:
My intention is to recreate the sort of effortless and fun science-fiction games we played in the late ‘80s, when I first started roleplaying. Specifically, I will try to emulate the high-adventure science fiction of the ‘70s as exemplified by the Terran Trade Authority books.
Haven takes place in the star system of Tau, containing many fantastic places and inhabited by several sentient species, and surrounded by an impenetrable barrier field. Several lifetimes worth of adventure await in Tau, but the ultimate mystery is this: who cut out the system from the rest of the galaxy – and why?