In this attempt, the book will cover a broad spectrum of subjects ranging from the current trends in the clinical management of the metastatic disease, to the systems biology approach for gaining insights into the mechanisms of metastasis. Some of the subjects covered will include: defining basic hallmarks of a metastatic cell, the concept of tumor stem cells, epithelial-mesenchymal transitions, evasion of immune-surveillance, tumor-stromal interactions, angiogenesis, molecular imaging and biomarker discovery.