Focusing on fundamentals and physico-chemical properties of solid state proton conductors, topics covered include :Morphology and Structure of Solid Acids ; Diffusion in Solid Proton Conductors by Nuclear Magnetic Resonance Spectroscopy ; Structure and Diffusivity by Quasielastic Neutron Scattering ; Broadband Dielectric Spectroscopy ; Mechanical and Dynamic Mechanical Analysis of Proton-Conducting Polymers ; Ab initio Modeling of Transport and Structure ; Perfluorinated Sulfonic Acids ; Proton-Conducting Aromatic Polymers ; Inorganic Solid Proton Conductors.