Targeted drug delivery (TDD) is a process of delivering medication to a specific site like infected organ, tissue or cell. It comprises engineered technologies for the targeted delivery and controlled release of therapeutic agents. It is extensively used in the treatment of cancerous tumors. TDD is also beneficial in treating some other diseases, including cardiovascular diseases and diabetes. It aims to target, localize, prolong and have a protected drug interaction with the diseased tissue. There are various advantages of TDD, which include having a more uniform effect of the drug, reduction in the frequency of the dosages taken by the patient, reduced fluctuation in circulating drug levels, and reduction of drug side-effects. Different approaches, evaluations and advanced studies on targeted drug delivery have been included in this book. It aims to serve as a resource guide for students and researchers alike and contribute to the evolution of research on this area of study.