The Indispensable, Unlikely Leadership of Abraham Lincoln

Bruce Feiler, New York Times columnist and author of "The Secrets of Happy Families."

28 Maalis 201315min

Elizabeth Grace Saunders, founder and CEO of Real Life E and author of "The 3 Secrets to Effective Time Investment."

21 Maalis 201316min

Sheryl Sandberg, Facebook COO and author of "Lean In: Women, Work, and the Will to Lead."

14 Maalis 201325min

Bruce Nussbaum, professor at Parsons The New School of Design and author of "Creative Intelligence: Harnessing the Power to Create, Connect, and Inspire."

7 Maalis 201315min

Bryan Garner, editor in chief of Black's Law Dictionary and author of the "HBR Guide to Better Business Writing."

28 Helmi 201314min

Mary Robinson, former President of Ireland.

21 Helmi 201311min

Daniel Pink, author of "To Sell Is Human" and the HBR article "A Radical Prescription for Sales."

14 Helmi 201321min

Jorge Cauz, president of Encyclopaedia Britannica.

7 Helmi 201315min