Reading a Book Residing on a Tru64 UNIX System from
  Bookreader Running on an OpenVMS System

  You cannot directly read a book that resides on a Tru64
  UNIX system from Bookreader software that is running
  on an OpenVMS system.  In that case you must first copy
  the book to the OpenVMS system using the EXCHANGE
  command.  For details about copying books, see the section
  Copying Books from Tru64 UNIX to OpenVMS Systems in
  the book Managing Bookreader Libraries and Books      .

  The system that contains the books you want to read is called
  the server system.  The system that is running Bookreader is
  called the client system.