What is the author's style in The Sacred Journey; a Memoir of Early Days by Frederick Buechner?

The story is told by a fifty-year-old Freddy, who is looking back on his memories of his early life, and he recognizes that his viewpoint is necessarily biased by the many years which have passed and the ways in which he has changed over the years. Freddy tries to understand what is going on in the heads of various people, but in reminiscing, he is not even sure which thoughts he really remembers having.