The File Selection Dialog Box
  Bookreader uses the same dialog box (File Selection) for the
  File menu choices of Open Book...  and Switch Library....
  Use the File Selection dialog box to see a list of files in any
  directory to which you have access and to select a file name.
  Select an item in the following table for more information.
  Information About         Tasks Related to this Dialog Box
  Filter                 |  Opening a Book not Shown in the
                            Library Window
  Directories            |  Changing Your Library
  Files                  |
  Selection              |
  For information about using the OK, Filter, and Cancel
  buttons, seeStandard Buttons     .