As the number of asthma and immunodeficiency cases continues to rise, thorough knowledge of immunologic processes is becoming increasingly important. Despite the seemingly small number of chapters, each chapter provides comprehensive coverage of all the topics necessary to pass the allergy-clinical immunology boards in the easy-to-use Secrets format. Chapters include epidemiology, pathophysiology, asthma, sinusitis, urticaria/angioedema, atopic dermatitis, anaphylaxis, food allergy/ intolerance, insect allergy, drug hypersensitivity, immunodeficiency, and systemic mast cell disease.