The practice of psychology has reached a point at which good intentions and theoretical allegiance are no longer sufficient to justify clinical decisions. Practitioners are increasingly expected to demonstrate that their interventions are grounded in reliable evidence, aligned with ethical standards, and responsive to the unique needs of each individual they serve. This work emerges from that expectation, offering a structured, integrative, and critical exploration of evidence-based practice as it is applied in real-world psychological settings. Rather than presenting evidence-based practice as a rigid or prescriptive framework, this book approaches it as a dynamic decision-making process. It recognizes the inherent complexity of clinical work, where empirical findings, professional judgment, and client values must be continuously balanced. Throughout the chapters, emphasis is placed on understanding not only what works, but why, for whom, and under what conditions interventions are most effective. This text is intended for clinicians, researchers, supervisors, educators, and advanced students who seek a deeper and more nuanced engagement with evidence-based psychological interventions. It aims to bridge the persistent gap between research and practice, equipping professionals with conceptual clarity, practical tools, and a critical mindset necessary for high-quality, accountable psychological care.