Here's a simple, practical handbook you can use and apply right now to improve your awareness, ability and happiness. Handbook for Preclears is a dianetics self-processing manual containing fifteen powerful yet easily ap...Here's a simple, practical handbook you can use and apply right now to improve your awareness, ability and happiness. Handbook for Preclears is a dianetics self-processing manual containing fifteen powerful yet easily applied exercises to help you overcome barriers in your life that are blocking your true potentials.