Beyond the Doubting of a Shadow

Beyond the Doubting of a Shadow
Roger Penrose (commentaries by Ken-ichiro Mogi and Kaoru Takeuchi)
ISBN 4-480-09006-1 (Japanese edition)

This book is not just a translation of Penrose's articles, but a collection of commentaries and discussions about Penrose's ideas on consciousness. Thus, Japanese title of the book is "ペンローズの量子脳理論" which means "The Quantum Brain Theory of Penrose."
Readers are required to have knowledge on not only Cognitive Science but also Computability, Mathematical Logic including Goedel's theory and contemporary Physics or background to understand them at least.
But, the translators, Mogi and Takeuchi, have wide variety of knowledge covering them, and their additional writings help us greatly understanding the original Penrose's idea. In this sense, the book is a unique work on the theme.

BTW, at least for me, I'm feeling that I need to read some more books to have enough understanding on the concept :(, and I'm looking fora good book on Mathematical Logic now....