The Astonishing Hypothesis: The Scientific Search for the Soul, Francis Crick, 1994, ISBN 0-684-80158-2.
The book is about the neural correlates of visual awareness. The author presents the existing evidence --- at the time of writing (1993) --- very carefully. The book is a masterpiece in presenting the evidence in its full subtlety to the nonspecialist.
A Vision of the Brain, Semir Zeki, 1993, ISBN 0-632-03054-2.
The visual cortex consists of many areas performing special-purpose computations. This book tells the story behind those discoveries. The book takes a historical approach, explaining why the discoveries were not obvious, explaining how the discoveries were made, the relevant visual anatomy, and what the current state of knowledge was, circa 1993. The book is also written for the nonspecialist.