Mass Spectrometry (MS) has rapidly become an indispensable tool in polymer analysis, and modern MS today complements in many ways the structural data provided by Nuclear Magnetic Resonance (NMR) and Infrared (IR) methods. Recent advances have sparked a growing interest in this field and established a need for a summary of progress made and results achieved. Mass Spectrometry of Polymers effectively fills this need. The discussion begins by introducing MS in detail, providing a historical perspective and a review of modern instrumentation and methods..