Glückel of Hameln (also spelled Gluckel or Glikl of Hamelin; also known as Glikl bas Judah Leib) (1646, Hamburg – September 19, 1724, Metz) was a Jewish businesswoman and diarist, whose account of her life provides scholars with an intimate picture of Jewish life in Germany in the late-seventeenth-early eighteenth century. Written in Yiddish, her diaries were originally intended for her descendants. The first part is actually a living will urging them to live ethical lives. It was only much later that historians discovered the diaries and began to appreciate her account of life at that time.

Harvey Mackay (born 1932 in Saint Paul, Minnesota) is a businessman and columnist. Mackay is perhaps best known as the author of five business bestsellers, including Swim With the Sharks (Without Being Eaten Alive), Beware the Naked Man Who Offers You His Shirt, and Dig Your Well Before You're Thirsty. He is a nationally syndicated columnist, and one of America's most popular business speakers. He is also founder, Chairman and CEO of Mackay Envelope Corporation, whose story he tells in anecdotes sprinkled throughout his books.