There were some interesting folks at the Lexington Depot the other night to celebrate the launch of Larry Tye’s latest book, “Superman: The High-Flying History of America’s Most Enduring Hero.’’ The book, which came out Tuesday, traces the long history of the Man of Steel, from comic strip – created by Cleveland teens Jerry Siegel and Joe Shuster — to cultural icon. Well-wishers, some of whom were sources for book, included Paul Levitz, longtime president/publisher of DC Comics; Nicky Wheeler-Nicholson Brown, whose grandfather Malcolm Wheeler-Nicholson is considered one of the creators of the modern comic book; Christopher Reeve’s father, Franklin Reeve, and two of the “Superman’’ actor’s brothers, Ben and Brock; and Paul Rothschild, whose mother, Lois Amster, was the high-school girl Siegel pined for and, when he wrote the “Superman’’ story, modeled Lois Lane after. (Also there were Mike and Kitty Dukakis and Blue Cross Blue Shield of Massachusetts CEO Andrew Dreyfus.) Tye, a former Globe journalist, spent two years working on the book, in part, he said, “because I wanted to be 10 years old again.’’ (He may be cured of that after attending the annual Superman conference in Metropolis, Ill., with 30,000 other Superman zealots.) Tye’s next book, which he’s months into, is a biography of Robert F. Kennedy.