What is the author's style in Lament for a Son by Nicholas Wolterstorff?

The structure of Lament for a Son is ambiguous. The book contains one hundred and eleven pages. It begins with a short preface from the author addressing the reason that he has written and published this work. The remainder of the book is filled with untitled anecdotes about dealing with the pain caused by Eric's death. There are no chapters or separations in the stories. The book is also interspersed with famous quotes that relate to the various anecdotes in some way.