Motivational interviewing (MI), or collaborative conversations that strengthens clients’ motivation and commitment to change (Miller & Rollnick, 2013), is an empirically supported treatment method to address a spectrum of challenges relevant to social workers and clients (Cummings, Cooper, & Cassie, 2009; Lundahl, Kunz, Brownell, Tollefson, & Burke, 2010). Built upon an extensive foundation of empirical research, the Third edition of Motivational Interviewing: Helping People Change contains significant adaptations with almost all new writing. This highly accessible and complete explication of MI integrates the burgeoning empirical research that has appeared since its last edition and describes its four broad “processes”—including engaging, focusing, evoking, and planning—instead of the “phases” and “principles” of prior editions. Despite reorganization, Motivational Interviewing continues its commitment to delineate the process of building collaborative partnerships with clients, honoring and evoking their motivations for change, and accepting their autonomy to select goals and make decisions for change. Miller and Rollnick describe MI as a partnership with clients with the spirit of profound acceptance to evoke the energy for change already present within clients. MI is relevant for a wide array of clinical scenarios and is thought to be particularly useful for clients who may be ambivalent about making changes in the therapeutic process, such as those compelled to mandatory treatment.