What is the author's style in The Cross and the Switchblade by David Wilkerson?

The Author"). The particular style (for lack of a better term) of that faith is especially important to note. Where the arguable majority of Christian faiths (both Protestant and Catholic) are perhaps more passive and church-oriented, the author's faith is grounded in both an active experience of The Pentecost (see "Objects/Places") and a belief in equally-active evangelism (taking that faith to people, as opposed to simply inviting them to join it). In other words, his life and the story told in the book of one particular aspect/phase of his life are both defined by his intense, passionate, sometimes questioning, but always trusting, experience of Christianity.