best seller, "The Amityville Horror" is the suspense-filled story of the agonies endured by George Lutz and his family when they moved into what was to be their "dream house" in rural Amityville, Long Island, N.Y. Starring with Brolin, as his wife is Margot Kidder, and Rod Steiger, the Academy Award winning actor who portrays a priest trying to help the couple. "The Amityville Horror" called for all of the strength that Brolin, a rugged outdoorsman, could muster. The psychological as well as physical endurance required by Sandor Stern's screenplay and Stuart Rosenberg's direction, would have felled an ordinary man. Off-screen, however, Brolin works his 230 acre ranch in Northern California. For hobbies, he rides a motorcycle, is a licensed pilot and a race car driver. As an actor, Brolin rose to prominence as Dr. Steve Kiley in TV's "Marcus Welby,M.D.," for which he won an Emmy. His many motion picture credits include "Von Ryan's Express," "Morituri,"Fantastic Voyage," "Skyjacked" and recently, "Capricorn One." He actively participates in competition racing. In the recent Long Beach Grand Prix Brolin raced against such other celebrities as Clint Eastwood, Bruce Jenner and Kitty O'Neil, holder of the women's land speed record at 518 mph. "The Amityville Horror," on top of the hard cover nonfiction best-sellers for nearly a year, is now in its 22nd printing as a Bantam Books paperback with sales approaching 5 million copies. The film was produced by Ronald Saland and Elliot Geisinger, with American International's president and board chairman, Samuel Z. Arkoff as executive producer.