Amber Frey's Witness for the Prosecution of Scott Peterson landed atop all the national hardcover nonfiction bestseller charts after less than a week in the stores. Not surprising, as Frey appeared on Dateline with Matt Lauer on January 4, the book's laydown date; the show got a 19% share, which translates to 15.9 million viewers. A day later, Wednesday, Frey appeared on Oprah and was invited back for another appearance on Friday. Two Oprahs the same week is unusual, and back-to-press activity for the book has been intense. ReganBooks launched the book with a 250,000-copy printing and has gone back four times, bringing the total to 385,000 copies.