Link to the Show / Show NotesThe Tests of a Leader: The Editors' Preview is a brand-new monthly podcast that lets you hear members of Harvard Business Review's editorial staff discuss the articles that will be in the coming issue. This time we're talking about the January 2007 issue, which focuses on the "The Tests of a Leader." Hear Paul Hemp describe how Harvard Business School professor Linda Hill learned why most first-time bosses fail--because being a boss is very different from what they thought it would be like. Hear Bronwyn Fryer discuss USC Professor Kathleen Reardon's argument that for a business leader, courage is a skill, as opposed to an innate talent.