Opening a Book from the Command Line (OpenVMS)
  You can start Bookreader and open a book directly from the
  command line.

  To open a book from the command line on OpenVMS, start
  Bookreader and specify the book name on the command line.
  For example,
  $ BOOKREADER filename.DECW$BOOK

  Alternatively, you can specify a bookshelf file to open. For
  example,
  $ BOOKREADER filename.DECW$BOOKSHELF

  You can include a full OpenVMS file specification on the
  command line. For example,
  $ BOOKREADER disk:[directory]filename.DECW$BOOK

  If you supply a file specification that is invalid, Bookreader
  tries to open the default library file, as pointed to by the
  DECW$BOOKSHELF logical name, in the locations speci-
  fied by the DECW$BOOK logical name. See online help or
  the book Managing Bookreader Libraries and Books for more
  information.