In this missionary classic, first published in 1970, Donald A. McGavran skillfully combines theological convictions, empirical research, sociological principles, and spiritual insights to mold a paradigm for effective evangelism strategy both at home and abroad. This third edition, revised and edited by C. Peter Wagner, retains the book's original aim and essence while modernizing the language and streamlining the flow of ideas, reducing the book's bulk by 35 percent. Other features of this edition include an additional chapter on divine healing and an expanded, updated, and annotated reading list.