Save to File Click on the Save to File button to save one or more sections, or an entire book to a file. By default, the name of the file will be the unique file name that Bookreader displays in the text-entry field. To change the name to one of your own, click on the text- entry field, erase the default name that Bookreader provides, and type the name of the file. You can specify a full file specification, including disk and directory.