This textbook offers a comprehensive MCQ-based approach to mastering critical care concepts, covering core ICU topics, updated guidelines, and recent advancements. With expert-authored questions, detailed explanations, and exam-oriented structure, it serves as an essential resource for intensivists and trainees, supporting both exam preparation and evidence-based ICU decision-making. This textbook is designed for intensivists and those involved in critical care, offering a practical approach to mastering ICU concepts through MCQs. Key features include: • Extensive coverage: It includes core topics such as ICU fundamentals, organ support therapies, sepsis, ARDS, hemodynamic monitoring, and neurocritical care, incorporating the latest guidelines. • Structured for exams: Organized into A and K types, it is suitable for beginners and advanced trainees. It includes case-based and scenario-based MCQs tailored for exams such as FCCS, EDIC, and DNB. • Expertly curated MCQs: Authored by renowned intensivists, the MCQs test clinical reasoning and real-world ICU decision-making. • Rationale and explanations: Each MCQ is followed by detailed explanations, clarifying the correct options and misconceptions in practice. • Advances in critical care: The book covers recent advancements such as ECMO and sepsis biomarkers, referencing key clinical trials. • Essential resource: This book is ideal for intensivists, residents, fellows, emergency physicians, anesthetists, and pulmonologists, providing a valuable resource for exam preparation and clinical practice. Overall, it is a comprehensive guide to both exam preparation and daily ICU decision-making, emphasizing the importance of understanding the reasoning behind critical care decisions.