This book covers the important role small molecules can play in the modulation of stress-activated protein kinase (SAPK), also called the mitogen-activated protein kinase (MAPK) pathway, and the potential this may offer in enabling the development of future medicine therapies. It is clear that MAP kinase pathway therapies could continue to drive increasing interest in the field, both within academic laboratories and also in the biotechnology and pharmaceutical sectors. This book provides an overview of protein kinase inhibitors, the biological roles of MAP kinases, ATP-competitive and non-competitive inhibitors, covalent inhibitors, and more. This book is intended for professors in academia, researchers in pharmaceutical and biotechnology sectors working on protein kinases, and graduate students in pharmacy/chemistry.