Stem cells hold great promise for cell therapy, tissue engineering, regenerative medicine and pharmaceutical and biotechnological applications. This book highlights the potency of stem cells, their property of self-renewal and their ability to differentiate into different cell lineages. It further describes the different markers to identify stem cells, sources, methods of isolation, culture including 2D, 3D and beyond and their cryopreservation. This is among the first books to discuss glycosylation and sialylation in stem cells. Chapters describe application of stem cells in regenerative medicine and therapy, and highlight their application in cancer therapy and spinal cord injury. The book talks about the important patents on stem cells. The book also highlights the plant stem cells, discussing their pluoripotent nature, role in organ regeneration after injury, specific stem cell niches, that signals to block differentiation studied in plants shoot, root, and vascular meristems, differentiation of plant stem cell, transcriptional regulation and epigenetic modification of plant stem cells. This book is exciting and cutting edge. It will be of great interest to doctors, students and researchers in the field of regenerative medicine, cancer , biotechnology and plant sciences.