Through their twenty-plus years of experience building teams, Marshall Calman and Jack Levitt of LeaderStrong, have developed a novel team-building framework. Their new book explores the journey of one business leadership group and how they develop into a Powerful Team using the C4 (C to the 4th Power) model. Marshall and Jack are Executive Leadership Coaches that work with Fortune 500 clients and sophisticated up-and-coming firms that want to get serious about leveraging their team's full power.