Controlling the fate of drug release administered into the body by any route has always been a fascinating challenge to pharmaceutical researchers. Simultaneously, optimization of drug delivery vis-?-vis maximizing the therapeutic benefit and minimizing the unwanted effects of drugs in the body, has been the ultimate goal of pharmaceutical scientists over the decades. Pharmaceuticals and drugs constitute a major chunk of the armamentarium for the health management across the globe, which has made great strides and is likely to undergo transformation into individualized or personalized drug delivery systems. Drug delivery to the target site, tissue, cell or receptor has always been a fascinating goal to be realized by the pharmaceutical researchers who have been evolving new and improved drug delivery systems. New discoveries and advances in analytical instrumentation have further demanded the precision medicine. Therefore, students must appreciate these concepts; however, making all the concepts available at one place is, admittedly, quite a tough job. This book presents to the readers the most relevant information in a simplified language. All the chapters have been meticulously contributed by the experts in their own fields, and hence readers are assured of up-to-date information in all areas of controlled and novel drug delivery systems. It provides useful, easy-to-understand reading material to postgraduate and doctoral students, teachers, researchers and scientists craving for the most relevant knowledge in this most rewarding pharmaceutical avenue.