A newcomer on the national charts is a book first published by Fireside back in 1990, The Seat of the Soul by Gary Zukav. He was the first author featured in Oprah's "Renew Your Spirit" segment the week of September 28; he did a series of five-minute spots over four days and the book shot up the lists. Seat of the Soul has had a total of 23 trips to press, seven since the Oprah show. Fireside shipped more than 320,000 copies to meet the demand; copies in print total about 700,000. Sales should continue apace, as Zukav is scheduled for an hour-long special in December. Fireside is planning a radio drive-time satellite tour on November 18 and 19 and is reissuing his Thoughts from the Seat of the Soul, first published in 1994.