‘The authors …extend the reach of their comprehensive reviews into theoretically driven and innovating explorations. The scope of coverage across and within chapters is striking. The developmentalist, the methodologist, the feminist, the contextualist, and the cross-culturalist alike will find satisfaction in reading the chapters’ - Catherine A Surra, University of Texas, Austin The science of close relationships is relatively new and complex. This volume has 26 chapters organized into four thematic areas: relationship methods, forms, processes, and threats, as well as a foreword and an epilogue.