This book investigates the complex and often elusive nature of borderline states within psychiatric diagnosis. John E. Mack, a noted psychiatrist, draws upon his extensive clinical experience and research to explore the diagnostic challenges and therapeutic implications of conditions that fall on the spectrum of severe personality disorders. The work examines the theoretical frameworks and empirical evidence used to understand these states, aiming to provide a clearer diagnostic and treatment approach for clinicians.

This text is recognized as a significant contribution to the understanding of borderline states in psychiatry, reflecting the clinical and theoretical perspectives of its author. It is likely to be of interest to psychiatrists, psychologists, and advanced students seeking a detailed exploration of this diagnostic category. The work's focus on theoretical frameworks and empirical evidence suggests a rigorous, academic approach to the subject matter.