If you wish to reprint something written by James Rachels, see who holds the copyright. If the copyright belongs to James Rachels, then you should contact his literary executor, David Rachels, at rachelsda@vmi.edu. David, James Rachels' older son, is a professor of English at the Virginia Military Institute. As a matter of general policy, David grants all requests and does not charge fees.
If the work is not copyrighted to James Rachels, then you should contact the copyright holder, who is usually the original publisher of the work. To our knowledge, no one has ever been denied reprint permission.
If your questions are more philosophical in nature, contact Stuart Rachels at srachels@bama.ua.edu. Stuart, James Rachels' younger son, is a professor of Philosophy at the University of Alabama.