What is the author's style in This House of Sky: Landscapes of a Western Mind by Ivan Doig?

The author's perspective is intentionally subjective. The work is a memoir and as such depends upon a sense of personal biases as an essential aspect of the entire text. This is nearly the opposite of those books written with as objective a perspective as possible. What is included in this book as harboring the greatest meaning is often enough that which must be removed in order to obtain an objective viewpoint.