Aldous Huxley

Known for his Brave New World, which seems to me his most simplistic book.

I can definitely recommend Island, Point Counter Point, and Doors Of Perception (about his use of hallucinogens).

But overall his work has a bit of the empty feeling of, say, the existentialists. I think Colin Wilson might have noted this, but I can't find a reference.

it was a nice book but