I expect a review of a book to be a review of the book. The contents of the book are only one aspect of the book. The digital or physical form of the book is

I expect a review of a book to be a review of the book. The contents of the book are only one aspect of the book. The digital or physical form of the book is no less important to me when I am looking to buy the book, particularly when the digital or physical form of the book might very well be irredeemable trash (rendering the quality of the contents irrelevant.)