Tolle Lege!.

The book will hit you at a visceral level and be prepared to listen to it beyond your normal listening routine. It's not a history of the war. The war is treated as a background character to the machinations of the political intrigue that transpired.

The book is a series of stories with a narrative that ties them all together. Be prepared to listen to 8 or so hours about a single topic such as the run up to the incursion of Austria or the invasion of Poland. The book is not a set of sound bites but is mostly exhaustive details on the political intrigue surrounding the topic.

Why can't all readers be as good as Grover Gardner?

I had ran out of science books on audible to listen to and had low expectations for this book. My expectations were wrong.