The hidden spring：a journey to the source of consciousness a journey to the source of consciousness Journey to the source of consciousness The tides of mind：Uncovering the spectrum of consciousness a physicist's journey into mystery of consciousness A lifetime journey to the source of nature's scents a lifetime journey to the source of nature's scents the gift of oblivion and the mystery of consciousness a surprising exploration into the worker of consciousness from the invention of the microprocessor to the new science of consciousness