Energy harvesting refers to the process by which energy is extracted from vast sources and stored for use by low-energy devices. The subjects discussed in this book that address the various aspects which fall under this field are energy conversion and storage, designing energy efficient systems, developing advanced technologies for enhancing extraction of renewable energy, etc. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject. It will prove to be an invaluable resource for academicians and professionals alike.