What is the author's style in the nonfiction book, War in Val D'Orcia, 1943-1944?

The book's format is essentially straightforward, following a linear progression of events from day to day, from month to month, and from year to year. While it seems clear, and logical, that descriptions of those events have not been shaped or revised to accommodate, and/or be accommodated into, a more novelistic and more traditionally narrative structure, they do so anyway. In other words, there is a sense of the "introduction / development / resolution" structure that defines conventional plotting, of the "developing conflict, increasing tension to a climax" experience, for both teller and hearer, that has defined storytelling from its very earliest days. This structure, as it has done perhaps for millennia, draws the reader in, awakening a sense of curiosity about what's going to happen next, about how circumstances are going to affect the lives of the individuals caught up in them, and how their lives/experiences are going to reflect and/or manifest the themes at play drive those events. Again, the point must be made that this structure cannot have been consciously adhered to by the author. Caught up as she was in the events she describes, she cannot possibly have known how they were going to turn out. It may be, however, that this section of the diaries was chosen for publication because that structure was found to be present after the fact. If that is in fact the case, a relationship between structure and theme clearly emerges, with structure reinforcing and manifesting the section's thematic contention that valuing the human spirit can, will, and should ultimately triumph over even the most inhumane circumstances.