Note that I'm only now STARTING on this book, so the release of the working cover is entirely premature! For those with an interest in Roman military history, you will recognize the image as a portrait of a signifer (more technically a vexillarius or vexillifer) wearing a bear pelt.
The first file is 72 dpi. Here is 300:
Permission to use the photo has been generously granted by photographer Andy Van den Eynde.