In assembling of this textbook, our aim is to foster a holistic understanding of allergic diseases, integrating basic science principles with clinical applications. The collaboration of experts from various disciplines ensures a rich collage of knowledge, blending research findings with practical clinical insights. Key Features A comprehensive textbook for students and practitioners regarding allergy diagnosis and management. Liberal use of images, tables, diagrams, and flowcharts for illustrations and easier understanding. 15 sections highlighting different aspects of allergy, viz. pathophysiology, aerobiology, systemic manifestations, diagnostics, and pharmaco-and immunotherapy. 100 chapters by international experts with major focus on clinical application of existing and upcoming modalities in allergy practice. Special subsets on unique presentations like silk and latex allergy, mast cell disorders, effect of pollution on allergies, and vaccination in an allergic patient. Separate section on Complementary and Alternative Medicine will help in comprehensive management. Dealing with emergency situations in allergy practice has been simplified. Exploration of newer horizons such as genomics, brain allergy, and organ cross-talk Ethical and medicolegal issues in practice have been highlighted. Attention has been drawn to research and biostatistics in routine clinical practice. Futuristic vision involving artificial intelligence for diagnosis and therapeutic purposes. Multiple Choice Questions (MCQs) at the end for self-assessment.