This book entitled “Cancer Stem Cell Markers and Related Network Path-ways” is about cancer stem cell (CSC) markers and the molecular network pathways. CSCs play an important role in the cancer drug resistance, metastasis and recurrence. Epithelial-mesenchymal transition (EMT) is closely related to CSC phenotype. This book covers various aspects of the molecular networks related to CSCs including the important phenotypic change such as EMT. Readers will discover the importance of the identification of CSC markers and EMT-related molecules in CSC network pathways. The CSC signaling pathways and EMT molecular network pathways attract researchers in the field to define the cancer therapeutic targets. Cancer environment is important in the acquisition of CSC phenotype in cells. The revealing of this CSC mystery is across 7 chapters.   The topic of this book is particularly relevant to research in thefield of cancer and stem cells, as well as the network pathways. We hope that this book helps the readers to be interested in understanding why the CSC concept is important and attractive.