Volume Seven of The Collected Works of Ken Wilber includes:

• A Brief History of Everything (1996) "Combining spiritual sensitivity with enormous intellectual understanding and a style of elegance and clarity, [this book] is a clarion
  call for seeing the world as a whole."—
  San
  Francisco Chronicle
  .
  
• The
  Eye of Spirit: An Integral Vision for a World Gone Slightly Mad
  
  (1997) uses the spectrum model to create an integral approach to psychology,
  spirituality, anthropology, cultural studies, and art.
  
• "An
  Integral Theory of Consciousness," an essay previously unpublished in book
  form, presents one of the first theories to integrate first-, second-, and
  third-person accounts of consciousness.