The purpose of this book is to help those who labor in the mission fields to be able to protect themselves and their families from physical illness and from psychological and interpersonal conflicts that so often defeat dedicated missionaries.  The authors of this book have all had experience in the mission field.  In fact, nearly one hundred years of personal experience has gone into their writings.  Some have been the pioneers in the church's mission efforts.  Some hold or have held the highest academic positions in Christian universities.  It is the hope of the authors that readers of this volume will find it useful and will enable them to better serve the Savior.