This is the info Sam found on the Book of the Damned in 10.11, There's No Place Like Home. This is the book Charlie was looking for. It has an ISBN. It has a publisher. It has a 2006 paperback edition.
This is the book Charlie found. It was written in blood on the skin of a nun.
Do you suppose this is the paperback or the hardback?
ETA... The Book of the Damned, the one with an ISBN, is a real book. Huh. Not written on a nun's skin, one can presume.