Nanotechnology employs knowledge from the fields of physics, chemistry, biology, materials science, health sciences, and engineering. It has immense applications in almost all the fields of science and human life. People and scientists argue that nanotechnology is likely to have a horizontal impact across an entire range of industries and great implications on human health, environment, sustainability, and national security. The impact of nanotechnology is felt by everyone. It is observed that many facets of the science are impacted and people are revisiting many research areas with a nanoview to understand how the same thing can work at the nano level. This phenomenon is revolutionizing pharmaceutical sciences, and many drugs are again being relooked at for the possibilities of delivery as a nanosystem. The objective of the present book is to address formulation and characterization properties of novel and intelligent nanoparticulate drug delivery systems (NPDDS) for effective cancer therapy.