A new biography of Hank Greenberg hit the bookshelves last week. The book, titled, "Hank Greenberg, The Hero of Heroes," details the life of the Tigers Hall of Famer. John Rosengren spent three years researching the book. Free Press sports writer Shawn Windsor recently caught up with the Minneapolis-based author. (Yes, he is a Twins fan.)

Q: Several books over the years have dealt with Greenberg. Why did you want to add to the library, so to speak?

A:I came across Greenberg's 1945 season-ending grand slam. As I was researching that, I realized there was a lot more to the story and figured there is room for a definitive biography out there. After I sold the idea to my publisher, I found out another book was being written about Greenberg. In the spirit of competition, I'll let the critics determine (the differences).

Q: What attracted you to Greenberg's story?

A:He was a significant figure in the history of baseball, but also a significant figure in the history of the nation. His Jewishness would not be as important today, whereas in the '30s, his ethnicity was a big story.

Greenberg spoke Yiddish in his home. There was anti-Semitism, and it was as commonly accepted as Jim Crow laws were in the South. (Yet) Greenberg didn't change his name. He observed Jewish holidays. He shattered stereotypes -- here comes Greenberg, a 6-4, 220-pound athlete that Jews everywhere could rally around. (Some historians argue) Greenberg was the most important American Jew of the 20th Century.