This document provides an introduction to the second edition of The Internal Auditing Handbook. It notes that significant changes have occurred in internal auditing since the first edition in 1997, with auditors now playing a more strategic role in areas like corporate governance and risk management. The new edition reflects these developments with additional chapters on governance, risk, and controls. It incorporates a variety of perspectives from thought leaders to provide a well-rounded view of the evolving audit context and role. The reasoning is to understand how internal auditing fits within the wider corporate agenda before addressing specific audit tasks. The goal is to help readers appropriately respond to changing expectations of the profession.