There is a very interesting book about him that I read years ago: "In Search of Sugihara" by Hillel Levine https://www.goodreads.com/book/show/1119369.In_Sear

There is a very interesting book about him that I read years ago: "In Search of Sugihara" by Hillel Levine https://www.goodreads.com/book/show/1119369.In_Search_of_Sugihara https://www.goodreads.com/book/show/1119369.In_Search_of_Sug... It seems to be readily available on kindle, but harder to find in print.