Plumbing & Mechanical columnist, business consultant and former contractor Al Levi’s new book, “The 7-Power Contractor: Run Your Contracting Business with Less Stress and More Success,” lays out seven simple business “powers” that his clients have applied successfully to run their businesses — planning and leadership, operating, financial, staffing, selling, marketing and sales coaching. The book provides readers with a link and password that enables them to download additional bonus materials related to each chapter.