Vintage Treasures: The Pangaea Series by Lisa Mason
The Pangaea volumes: Imperium Without End and Imperium Afire
(Bantam Spectra, 1999 and 2000). Covers by Sanjulian
Lisa Mason began her career in the late 80s; her first novel was the cyberpunk Arachne (1990), set in an earthquake-devastated San Francisco. Her most popular title, Summer of Love (1994), about a time traveler from 2467 who visits the 1967 Summer of Love in San Francisco, was a finalist for the Philip K. Dick Award and spawned one sequel, The Golden Nineties (1995).
We’re concerned today with perhaps her most ambitious series, the two-volume Pangaea cycle set on a distant world (which — spoiler — turns out to be an alternate history version of San Francisco) where people live and work in a rigid society strictly segregated by genetic purity. Here’s John Clute’s summary from The Encyclopedia of Science Fiction.