1 Introduction 2 Photocatalysis: The Principles 3 Practical Aspects of Photocatalysis 4 Photocatalytic Oxidative C-C Bond Formation 5 Decarboxylative Coupling Reactions 6 Proton-Coupled Electron Transfer 7 Organocatalysis with Amines in Photocatalysis 8 Copper-Based Photocatalysts for Visible-Light-Mediated Organic Transformations 9 Gold in Photocatalysis 10 Palladium in Photocatalysis 11 Nickel in Photocatalysis 12 Acridinium Dyes and Quinones in Photocatalysis 13 Flavins in Photocatalysis 14 Organic Dyes in Photocatalytic Reductive C-H Arylations 15 Silicates in Photocatalysis 16 Photocatalytic Cycloadditions 17 Photocatalytic Carbon-Heteroatom Bond Formation 18 Photocatalytic Introduction of Fluorinated Groups 19 Heterogeneous Photocatalysis in Organic Synthesis 20 Photocatalysis in the Pharmaceutical Industry