Fingerprints of the Gods Is a New Nonfiction Book

After Underworld, you took a break from nonfiction. But the subject has moved on a great deal in the last 20 years. With this new scientific evidence coming in, I realized that I had to go back to the story and write another book which brought all of the new information together. And then there's a huge, mysterious nonfiction book to be done about America. Now that I know what happened in North America between 12,800 and 11,600 years ago, I'm beginning to feel that it may be the place where the final clues come from.