Book excerpt: This book is an update of the annual flagship study by the Asia Competitiveness Institute at the Lee Kuan Yew School of Public Policy, National University of Singapore, that dissects Indonesia's sub-national competitiveness at both the provincial level (covering 34 provinces) and the regional level (covering six major island groups). Based on a rich dataset of 100 indicators, the study covers four environments of competitiveness: (1) Macroeconomic Stability, (2) Government and Institutional Setting, (3) Financial, Businesses, and Manpower Conditions, and (4) Quality of Life and Infrastructure Development. It also presents each province and region's comparative strengths and weaknesses, and conducts 'what-if' policy simulations to propose policy suggestions.Aside from exploring competitiveness, the book also features empirical research on the determinants of growth slowdown in Indonesian provinces and its impact on policy implications. It also features the inaugural Ease of Doing Business Index on Attractiveness to Investors, Business Friendliness and Competitive Policies (EDB Index ABC) for Indonesian provinces. Coupled with practical insights and policy implications, this book is a recommended read for policymakers, researchers, and the general audience interested in Indonesia's economic development.