This book explores the diversity and dynamism of Islam in Southeast Asia through the concept of <i>adab</i>, or beautiful behavior. Amid the complexity of Islamic civilization, <i>adab </i>provides Muslims with a shared sense of sacred history, identity, and morality. In the context of Islamic ethics, <i>adab </i>defines the rules of personal and public etiquette: good manners, proper conduct, civility and humaneness. Featuring the interdisciplinary research of nine prominent scholars of Islam, the book offers new perspectives on <i>adab</i>''s multiple meanings and myriad applications for Muslim communities in Malaysia and Indonesia. The chapters examine a wide range of texts, spotlighting the writings of prominent Muslim thinkers, and contexts, focusing on the everyday experiences of lay Muslims. Drawing on a variety of theoretical and methodological lenses, the essays reveal how beautiful behavior impacts local institutions, cultural practices, and religious imaginations via politic