This new book is basically the catalog of the exhibition. It is a large and gorgeous book.
However, from a pure Disney history standpoint I find it disappointing, as it focuses almost solely on the costumes from Disney's most recent live-action movies. Only 23 pages out of 176 discuss the costumes from the older Disney movies. I understand the decision, from a marketing standpoint, but from a Disney history angle, this book is not a "must have."