Written by leading scientists in the field of delivery of protein and peptide drugs to tumors for cancer therapy, this important book provides a broad introduction to the field, with discussion by key experts on the physiological barriers for protein and peptide drugs in tumors, and the different approaches to stabilization of these drugs in biological surroundings, as well as their enhanced delivery to tumors and inside cancer cells. This book can be used as an advanced textbook by graduate students and young scientists and clinicians at the early stages of their career. It is also suitable for non-experts from related areas of chemistry, biochemistry, molecular biology, physiology, experimental and clinical oncology and pharmaceutical sciences, who are interested in general problems of drug delivery and drug targeting as well as in a more specialized topics of using protein and peptide drugs for tumor therapy.