In the Babylon 5 science fiction saga, the Book of G'Quan is a Narn holy book. Each book is copied painstakingly by hand, exactly reproduced from the original version. In this way, the accuracy of the text and images are assured.
It is considered disrespectful to "thump" the book.
There is a greater darkness than the one we fight. It is the darkness of the soul that has lost its way. The war we fight is not against powers and principalities, it is against chaos and despair. Greater than the death of flesh is the death of hope, the death of dreams. Against this peril we can never surrender. The future is all around us, waiting in moments of transition, to be born in moments of revelation. No one knows the shape of that future, or where it will take us. We know only that it is always born in pain.
The Narn Ambassador G'Kar uses this book in several religious ceremonies, but, perhaps more importantly, he finds within the book a drawing of a Shadow vessel, and thus attempts to warn the other races of the coming of the Shadows before this is made clear by other sources.
The book also includes references to the destruction of Narn "Mindwalkers", or telepaths, by the Shadows centuries ago, explaining the lack of modern Narn telepaths, as well as helping to reveal the link between the Shadows and telepathic abilities.