Book excerpt: This book describes the latest advancements in molecular and cellular engineering approaches in addition to nanotechnology for cancer therapeutics and imaging. It also provides an excellent background and state-of-the-art developments in the fields of drug and gene delivery, engineering nanoparticles for therapy and diagnostics, and cancer imaging techniques.The contents of this book include chapters on cutting-edge science in molecular and cellular engineering and nanotechnology as applied to therapeutics and imaging in cancer diseases. The chapters also provide a comprehensive overview on gene therapy and delivery methods for cancer treatment, oral drug delivery and barriers, cancer imaging for diagnostics and therapy, and the latest developments in these fields.