Graham Hancock made a great deal of sense in his thoughts on the destruction of the ScabLands and the massive flood that inundates so much of the northern hemisphere at that time. I found his theories sound and fascinating. About the only thing I did feel, is that the book went on for too long. I think I was reading the same thing several times over and finally grew a little tired of it. Nevertheless, for me, it rang true and was the closest anyone has ever come to understanding what happened to the planet a mere 12,000 years ago and for that it is worth every page he wrote.