Nanotechnology and nanoparticles have emerged as an important tool towards improving cancer therapeutics and diagnostics. Recognizing the indispensable role of nanoparticles, specifically in targeted delivery of chemotherapeutic and other anti-cancer agents to tumors, this book provides a comprehensive account of the different methods used for the preparation of nanoparticles, including the mechanism behind each method, for a beginner in the field. The authors describe he commonly used methods of physical post-synthesis characterization, as well as the toxicity aspects of nanoparticles, particularly the effect of nanoparticles on different systems of the human body. Appreciating the interdisciplinary nature of nanotechnology applications in cancer drug delivery, a brief description of the genesis and growth of a tumor has also been included in the book.