This book highlights the views of accountability of INGO leaders and assesses the challenges they face in implementing organizational accountability . The author draws on over 150 interviews with executives about accountability and uses empirical evidence to propose an Accountability Puzzle that shows how definitions, audiences, practices, and signals about accountability are interconnected and interdependent; INGO accountability is incomplete without all the pieces assembled. Nevertheless, more accountability is not always the answer and can hinder leaders' responsiveness to stakeholder demands. This book will make an important contribution to NGO literature by offering a greater understanding of that accountability means for those in charge of these transnational organizations.