This book investigates the life and leadership of Lewi Pethrus, a monumental figure in Swedish and international Pentecostalism. Joel Halldorf describes Pethrus' role in the emergence of Pentecostalism in Sweden, the ideals and practices of Swedish Pentecostalism, and the movement's turn to professional party politics.

When Pentecostals in the USA ventured into politics, they became allied with the Republican party, and later Donald Trump. The Swedish Pentecostals took another route: while culturally conservative, they embraced the progressive economic politics of the Social Democratic party. During the 2010s, they have also rejected the nationalism of the growing populist movement. Halldorf analyzes and explains these differences between Swedish evangelicals and Pentecostals on the one hand, and the Religious Right in the USA on the other.