Humphrey's latest book, a sequel to his 1992 book, A History of the Mind , is based on a series of lectures he gave at Harvard in 2004 to the Mind/Brain/Behavior Initiative Distinguished Lecture Series, and is written in a style intended to re-create as nearly as possible the informal give-and-take of those lectures, in which the audience sat bathed for much of the time in the intense red light reflected from a giant screen behind the lecturer. It is very much Humphrey's purpose to get readers to set aside what they think they know about seeing red and to experience seeing red anew, so they can reflect on their experience and not just on some remembered or imagined episode of seeing red in the past. He is attempting to resurrect and sharpen a suitably hard-to-credit claim made by the brilliant 18th century Scots philosopher Thomas Reid: our mind--our brains--are equipped with two very different and surprisingly independent "provinces," or systems, sensation and perception, and contrary to all appearances, it is not the case that sensation provides the raw material out of which perceptions are then refined.There is no doubt that his methods have already made a large contribution to our understanding of consciousness. In fact, a price he pays for his impressionistic methods is that he influences other thinkers almost subliminally; more than a few theorists have absorbed major elements of his message and then innocently reworked them and presented them as their own pet ideas. If that is a projectible pattern, we can anticipate that this book will be regarded as a somewhat eccentric and dismissible foray by many whose own work will subsequently bear the stamp of his thinking, whether they realize it or not. Among philosophers, unwitting reinvention rivals denunciation as candidates for the sincerest form of flattery, and by those measures, Humphrey has had more than his share of deserved accolades.