Previewing different types of documents

This is directed to a preview application for displaying several documents simultaneously in a single window, where the several documents are displayed as books. To view the pages of a document, the preview application can open the book and display the pages of the document (e.g., in a one or two-dimensional array). A user can also search for particular terms within the several documents. In response to a search, the preview application can filter the pages of the several documents and only display those pages that include the search terms. The displayed pages can be ordered in any suitable manner, including for example by search rank.