This book has the merit of a clear and concise style. The main purpose of this book is to demonstrate that sensation/qualia on the one hand and information/perception on the other are separate systems in the brain, with the former having a largely passive role. Five main arguments are advanced to support this. Possibly the most important is blindsight a form of non-conscious vision argued here to be a demonstration of a separate path for perception. The very limited functionality of blindsight makes the suggestion of a properly functional separate pathway unconvincing. The ability to adjust to metamorphopsia, a condition where there are fluctuations in the visual field is a second argument, but in principle this appears to be little more than adjusting to being on a rolling ship at sea, and hardly justifies a separate pathway. Thirdly, the author claims that altered perception as a result of drugs such as LSD indicate separate pathways, but this would seem to require a major rejigging of our understanding of how drugs act on receptors. Sensory substitution where patients have a form of sight restored by converting visual signals into auditory or tactile signals is also put forward, but what the patients seem to describe is a mixture of modalities, similar to synaesthesia. Finally, there is a slightly bizarre experiment where subjects are persuaded that they are being tapped on a visible artificial hand, rather than their real hand, which is hidden under the table. The answer to this would seem to be that this was never likely to have happened in the conditions for which we evolved, and the most adaptive thing would be for the brain to model on the basis that the tapping must be coming from the visible artificial hand.