This audiobook is done from a novelization of Macbeth. Most of the storyline is drawn from the play but the authors also drew from real historical events and fleshed out a few characters to add to the story. Add in Alan Cumming as the narrator and you get a great audiobook.
I did feel that the volume was set a bit low and I had trouble always hearing the book over my car when I was traveling at high speeds (which I tend to do). This made the book hard to get into at times. I do recommend it regardless. But Macbeth is also my favorite Shakespeare play.
