"This revised and expanded second edition updates a provocative collection of 14 expert contributions to the debate inaugurated in 2013 addressing LIS's historic avoidance in defining and envisioning its young adult users by offering readers a diverse set of possible responses to how LIS should define YAs for its own professional, institutional, and research purposes"-- The essays in this collection attempt to introduce critical social theory to the broadest, most compelling, most practical aspects of YA librarianship. Some concentrate on fundamental aspects of YA librarianship that currently go unaddressed in daily practice. The diverse concepts and arguments represented are designed to spark lively discussion with which to prepare students for becoming deliberative professional practitioners. -- adapted from Preface