In 1932 Mizner published "The Many Mizners", an autobiography covering his youth, year mining, and time in New York until the death of his mother. A second volume telling of his life in Florida was begun but never completed; the Palm Beach Historical Society has the typed manuscript. Mizner died in 1933 of a heart attack in Palm Beach and is buried in the family vault at Cypress Lawn Memorial Park. According to Donald Curl, author of "Mizner's Florida", He was just completely outgoing and basically a really good guy. One of the things he was noted for was the kindness toward the people who worked for him and the courtesy he showed them. Some of the other architects of this era were almost the reverse; they saw the other architects as their employees, and they should have nothing to do with the design other than putting it on paper. Mizner was not that way. When the bust began in Florida, he actually helped some of the young architects get established elsewhere. The vast majority of Mizner's employees developed a deep affection for and allegiance to him: "It was a pleasure working for Mizner", one remarked. Addison accompanied his father when the latter travelled to Guatemala in August 1889 to take up his duties there. His first stop, aged 15, on the boat to Guatemala was Mazatlán, Mexico. This was Addison's first direct contact with the Hispanic world, which he described as "the greatest day of my life." His father Lansing Mizner spoke fluent Spanish, as did his paternal step-grandfather, James Semple, also a U.S. diplomat in Spanish America. Addison, who became fluent, after some tutoring enrolled at the Instituto Nacional in Guatemala City, "where we learned that boys fought with knives and not with fists." He remained there for a year, visiting Costa Rica, Nicaragua, and Honduras with his father, before returning to California in 1890 to study at the Bates School, a boarding school in San Rafael, California. His studies there ended in 1891 because of his brother Wilson's expulsion for misbehavior. He continued his studies briefly at Boone's College in Berkeley, California, with the hope of passing the entrance examination for the University of California (today the University of California, Berkeley). Either he never presented himself for the examination, or he failed it. In any event, that was the end of his formal education. In his own words:  I have based my design largely on the old architecture of Spain — with important modifications and to meet Florida conditions.