Organic Chemistry: Structure, Mechanism, and Reactivity logically presents in simple and clear terms the required facts and principles needed to succeed in Organic Chemistry Examinations. The organic book contains Thirteen Chapters that were clearly written, better illustrated and presented in Three Sections: Part I - Structure (Nomenclature and Atomic Structure & Bonding); Part II - Mechanism (Organic Reactions & Reaction Mechanisms) and Part III- Reactivity (Organic Terms, Hydrocarbons, Alcohols, Carboxylic acids, Carbohydrates, Lipids & Esters, Aromatic Compounds, Aliphatic Nitrogen compounds and Aldehydes & Ketones). Each chapter of the book reflects basic sophistications of a well-tutored and experienced writer and these qualities of presentation will certainly stimulates interests in learners. Sufficient for candidates preparing for General Certificate of Education, Polytechnic, University and other relevant examinations. This book, therefore is an additional material that would be highly useful for both students and teachers of Organic Chemistry Keywords: Organic Chemistry, Structure, Mechanism, Reactivity, Curved Arrow, Reaction