I just finished "Drop City" by T.C. Boyle and picked up "Blue Skies". I'm only 2 chapters into "Blue Skies" so can't really say much about it, though it feels a lot like "Tortilla Curtain".
"Drop City" did not involve any characters who were writers, was not set in LA and established two sets of characters in highly disparate settings in the Sixties and of their eventual intersection. Well worth it.
Yeah, I enjoyed them when I was a college student but on later re-reading Corwin just comes across as a two-dimensional good-hearted wise guy who can take care of himself. Kind of a fantasy version of early-generation science fiction a la Asimov or Heinlein.