A brain disorder in which there is a compulsive engagement in rewarding stimuli despite adverse consequences is known as addiction. The main features which attract addictive stimuli include the fact that they appear to be reinforcing and intrinsically rewarding. A person addicted to such stimuli will seek repeated exposure to them as these substances generate a feeling of positivity and pleasure. Alcoholism, nicotine addiction, cocaine addiction, gambling addiction, sexual addiction and food addiction are some of the common types of drug and behavioral addictions. The risk of addiction is quite high in the age of adolescence. The topics included in this book on addiction are of utmost significance and bound to provide incredible insights to readers. It strives to provide a fair idea about this disorder to help develop a better understanding of the clinical advances related to it. A number of latest researches have been included to keep the readers up-to-date with the global concepts in the study of addiction.