1. A method for aligning pages in a book comprising the steps of: generating portable document format (PDF) pages corresponding to pages of a book wherein the PDF pages comprise content areas of text or graphics or both and non-content areas surrounding the content areas; removing from the PDF pages peripheral, non-content areas to generate cropped PDF pages of the content areas on the page; and selecting a feature of the cropped PDF pages common to all the cropped PDF pages and aligning all cropped PDF pages to the selected feature.