Billed as the book that unlocks the Kennedy assassination, Double Cross: The Explosive, Inside Story of the Mobster Who Controlled America, by Sam and Chuck Giancana, boasts Mafia responsibility for everything from the deaths of Marilyn Monroe and both Kennedys to the rise of Philippine strongman Ferdinand Marcos. Readers eager for an underworld tie to major historic events have put Double Cross on the nonfiction list at No. 4. FICTION WEEKS ON LIST

1 The Pelican Brief 3 John Grisham, Doubleday, $22.50 2 Rising Sun 8 Michael Crichton, Knopf, $22 3 VOX 7 Nicholson Baker, Random House, $15 4 The Road To Omaha 5 Robert Ludlum, Random House, $23.95 5 The Elf Queen Of Shannara 2 Terry Brooks, Del Rey, $22 6 Scarlett: The Sequel To Margaret Mitchell's Gone With The Wind 24 Alexandra Ripley, Warner, $24.95 7 Outerbridge Reach 4 Robert Stone, Ticknor & Fields, $21.95 8 Guardian Angel 7 Sara Paretsky, Delacorte, $20 9 Treasures 3 Belva Plain, Delacorte, $21 10 Hideaway 10 Dean R. Koontz, Putnam, $22.95

NONFICTION

1 A Return To Love 6 Marianne Williamson, HarperCollins, $20 2 Revolution From Within: A Book Of Self-Esteem 9 Gloria Steinem, Little, Brown, $22.95 3 Backlash: The Undeclared War Against American Women 20 Susan Faludi, Crown, $24 4 Double Cross 4 Sam and Chuck Giancana, Warner, $22.95 5 Den Of Thieves 22 James B. Stewart, Simon & Schuster, $25 6 How To Satisfy A Woman Every Time... 8 Naura Hayden, Bibli O'Phile, $14.95 7 Awaken The Giant Within 18 Anthony Robbins, Summit Books, $20 8 Rogue Warrior 2 Richard Marcinko, Pocket Books, $22 9 More Wealth Without Risk 16 Charles J. Givens, Simon & Schuster, $23 10 Unto The Sons 5 Gay Talese, Knopf, $25