Oliver Sacks' The Man Who Mistook His Wife for a Hat tells the stories of individuals afflicted with fantastic perceptual and intellectual aberrations: patients who have lost their memories and with them the greater part of their pasts; who are no longer able to recognize people and common objects; who are stricken with violent tics and grimaces or who shout involuntary obscenities; whose limbs have become alien; who have been dismissed as retarded yet are gifted with uncanny artistic or mathematical talents.

Music can move us to the heights or depths of emotion. It can persuade us to buy something, or remind us of our first date. It can lift us out of depression when nothing else can. It can get us dancing to its beat. But the power of music goes much, much further. Indeed, music occupies more areas of our brain than language does - humans are a musical species.

In The River of Consciousness, Dr. Sacks takes on evolution, botany, chemistry, medicine, neuroscience and the arts and calls upon his great scientific and creative heroes - above all, Darwin, Freud and William James. For Sacks these thinkers were constant companions from an early age; the questions they explored - the meaning of evolution, the roots of creativity and the nature of consciousness - lie at the heart of science and of this audiobook.

Sleep is one of the most important but least understood aspects of our life, wellness, and longevity. Until very recently, science had no answer to the question of why we sleep, or what good it served, or why we suffer such devastating health consequences when we don't sleep. Compared to the other basic drives in life - eating, drinking, and reproducing - the purpose of sleep remained elusive.

As with his previous best seller, The Man Who Mistook His Wife for a Hat, in An Anthropologist on Mars Oliver Sacks uses case studies to illustrate the myriad ways in which neurological conditions can affect our sense of self, our experience of the world and how we relate to those around us. Writing with his trademark blend of scientific rigour and human compassion, he describes patients such as the colour-blind painter or the surgeon with compulsive tics that disappear in the operating theatre - patients for whom disorientation and alienation but also adaptation are inescapable facts of life.