I love the Encyclopedia Britannica, I have it on my bookshelf and on my computer, the DVD is one of my very favorite pieces of software and is a great buy. But this 'book' is merely the articles related to the subject pulled from the Encyclopedia Britannica, it is a collection of articles and not really a book at all. Very little if any thing in this 'book' is unique, nearly everything in it can be found in the Encyclopedia. The Britannica company has pulled a fast one with software books like this one, they cut a small piece from their Encyclopedia and sell it at an inflated price. It doesn't make any sense to buy these little marked up software pieces, when the whole can be had for less than the sum of it's parts.