Alphabet soup: ''H'' Is for Homicide, the latest of Sue Grafton's Kinsey Millhone mysteries, finds her heroine engaged in an investigation of insurance fraud and embroiled in a domestic nightmare (see review on page 60). So reliable is Millhone as a sleuth that her fans have already put her new case on the best-seller list, where it appears at No. 5. WEEKS FICTION ON LIST 1 THE FIRM 11 John Grisham, Doubleday, $19.95 2 LOVES MUSIC, LOVES TO DANCE 2 Mary Higgins Clark, Simon & Schuster, $21.95 3 THE SEERESS OF KELL 5 David Eddings, Del Rey, $20 4 HEARTBEAT 13 Danielle Steel, Delacorte, $21.95 5 ''H'' IS FOR HOMOCIDE 3 Sue Grafton, Holt, $17.95 6 THE SEVENTH COMMANDMENT 4 Lawrence Sanders, Putnam, $22.95 7 ASPEN GOLD 4 Janet Dailey, Little, Brown, $19.95 8 DAMAGE 8 Josephine Hart, Knopf, $18 9 THE NOVEL 5 James Michener, Random House, $23 10 THE DRUID OF SHANNARA 9 Terry Brooks, Del Rey, $19.95

NONFICTION 1 NANCY REAGAN: THE UNAUTHORIZED BIOGRAPHY 5 Kitty Kelley, Simon & Schuster, $24.95 2 YOU'LL NEVER EAT LUNCH IN THIS TOWN AGAIN 8 Julia Phillips, Random House, $22 3 IRON JOHN: A BOOK ABOUT MEN 24 Robert Bly, Addison-Wesley, $18.95 4 HOMECOMING 40 John Bradshaw, Bantam, $18.95 5 MOVING PICTURES 4 Ali MacGraw, Bantam, $20 6 THERE ARE NO CHILDREN HERE 4 Alex Kotlowitz, Doubleday, $21.95 7 FINANCIAL SELF-DEFENSE: HOW TO STOP GETTING TAKEN AND START MAKING MONEY 23 Charles Givens, Simon & Schuster, $22.95 8 LIFE IS TOO SHORT 5 Mickey Rooney, Villard, $22.50 9 WEALTH WITHOUT RISK 116 Charles Givens, Simon & Schuster, $19.95 10 A HISTORY OF THE ARAB PEOPLES 8 Albert Hourani, Harvard University Press, $24.95