“Everyone has a Butch story.” So says author Douglas Cavanaugh about surfer Butch Van Artsdalen. And so says Carl Ekstrom. And Mike Hynson. And Hank Warner. And Melinda Merryweather. And members of the Windansea Surf Club. To share their stories, Cavanaugh wrote and recently published “Remembering Butch: The Butch Van Artsdalen Story,” a biography about the surf legend who rode the waves at Ehukai Beach in Hawaii known as the Banzai Pipeline and lived in La Jolla for five years and surfed at Windansea Beach. He died at age 38 in 1979. “When I get into something, I get into the history,” Cavanaugh said. “In the mid-1990s, I watched a surfing documentary that had a small segment on Butch. At the end of his part, it said he died at 38 from alcoholism. To drink yourself to death at 38 is jaw-dropping, so I wanted to know more about how he got to that point.”