Mary Higgins Clark may write mysteries on the staid and bloodless side, but her fans sure are passionate. The perennially best-selling author (Let Me Call You Sweetheart) currently boasts two novels on two different charts. Silent Night, her latest, about a family that visits New York and falls prey to a maniacal ex-con (see this week's review), climbs seven spots to No. 2 on the hardcover list. There are more than 1 million copies in print after five pressruns. Meanwhile, 1994's The Lottery Winner, featuring a cleaning woman who wins $40 million and turns sleuth, has jumped from No. 15 to No. 1 on the paperback list, with 2.1 million copies in print after two pressruns.

FICTION WEEKS ON LIST

1 THE LOST WORLD Michael Crichton, Knopf, $25.95 4 2 SILENT NIGHT Mary Higgins Clark, Simon & Schuster, $15 2 3 THE HORSE WHISPERER Nicholas Evans, Delacorte, $23.95 6 4 MORNING, NOON & NIGHT Sidney Sheldon, Morrow, $24 6 5 COMING HOME Rosamunde Pilcher, St. Martin's, $25.95 8 6 COME TO GRIEF Dick Francis, Putnam, $23.95 5 7 ''L'' IS FOR LAWLESS Sue Grafton, Holt, $24 7 8 THE CELESTINE PROPHECY James Redfield, Warner, $17.95 86 9 BEACH MUSIC Pat Conroy, Doubleday/Talese, $27.50 16 10 DEAD MAN'S WALK Larry McMurtry, Simon & Schuster, $26 8

NONFICTION

1 MY AMERICAN JOURNEY Colin Powell with Joseph E. Persico, Random House, $25.95 5 2 MEN ARE FROM MARS, WOMEN ARE FROM VENUS John Gray, Ph.D., HarperCollins, $23 133 3 EMOTIONAL INTELLIGENCE Daniel Goleman, Bantam, $23.95 4 4 A GOOD LIFE Benjamin C. Bradlee, Simon & Schuster, $27.50 3 5 THE SEVEN SPIRITUAL LAWS OF SUCCESS Deepak Chopra, New World Library, $14 35 6 MY POINT...AND I DO HAVE ONE Ellen DeGeneres, Bantam, $19.95 8 7 SPONTANEOUS HEALING Andrew Weil, M.D., Knopf, $23 20 8 A GOOD WALK SPOILED John Feinstein, Little, Brown, $23.95 19 9 MIDNIGHT IN THE GARDEN OF GOOD AND EVIL John Berendt, Random House, $23 78 10 SISTERS Carol Saline and Sharon Wohlmuth, Running Press, $27.50 37

MASS-MARKET PAPERBACKS

1 THE LOTTERY WINNER Mary Higgins Clark, Pocket Books, $6.99 2 2 TOM CLANCY'S OP-CENTER II: MIRROR IMAGE Tom Clancy and Steve Pieczenik, Berkley, $6.99 3 3 DARK RIVER OF THE HEART Dean Koontz, Ballantine, $7.99 1 4 WILD HORSES Dick Francis, Jove, $6.99 4 5 NOTHING LASTS FOREVER Sidney Sheldon, Warner, $6.99 10 6 THE ALIENIST Caleb Carr, Bantam, $6.99 19 7 THE DUKE Catherine Coulter, Topaz, $6.99 2 8 SPENCERVILLE Nelson DeMille, Warner, $6.99 5 9 HOW TO MAKE AN AMERICAN QUILT Whitney Otto, Ballantine, $6.99 1 10 THE BODY FARM Patricia Cornwell, Berkley, $6.99 13