Luckily, I listened to this book while I exercised rather than read it and found that Douglass's straightforward uncomplicated literary style directly complimented the mindless activity I strove to accomplish.  This is not to say that I thought the book uninteresting or boring in any way.  On the contrary, the storyline moves along, albeit the pre-historical plotline jars pathetically with the author's modern jargon leaving the reader no choice but to roll one's eyes upward in utter amazement at the blatant inconsistency.