Father Damboriena's book has as its purpose the exposition of the beliefs and practices of the Pentecostal movement. The first part of the work is historical and traces Pentecostalism from the Pauline churches to 20th century America. The second, and principal, section is theological in nature and explores the complex of Pentecostal beliefs, the points on which Pentecostalism agrees and disagrees with the more conventional Christian churches, and such specifically Pentecostal phenomena as glossolalia and ""divine healing."" The concluding section is a survey of Pentecostal missions, both in themselves and with respect to the ecumenical movement. Throughout the work, Damboriena maintains a Frae objectivity; his intention is to explain and elucidate, not to criticize. His research has been exhaustive and firsthand, and his treatment is as comprehensive as a single substantial volume will allow. In many respects, therefore, Tongues As of Fire is superior to the current ""standard,"" Nichol's Pentecostalism, and it is full of helpful information for ministers and priests.