What is the author's style in Rees Howells: Intercessor by Norman Grubb?

Most of the book is an account of the life events of Rees Howells. There are testimonies from the lives of other individuals but they are told in the context of how they affected Rees' life. It is written in past tense with the majority of writing being in story form with some dialogue. There are many excerpts included from meeting minutes and journal entries, but in all cases the sources are specified which helps validate the authenticity.

The book reads as a story unfolding beginning with the past and following a time line. There are a few places where events are shared out of the current time but it was for the benefit of clarification.