Book excerpt: Fluorescence imaging, at macro, micro, and submicro scales, has revolutionized biological science in the past 30 years. Immunolabelling has provided precise targeting of molecules in fixed tissue, while fluorescent proteins have enabled localization in living tissues. Fluorescent indicators enable imaging of dynamic changes in cell metabolism. This book covers, for the first time, imaging at all scales from macro to submicro (superresolution). Its authors include Robert Clegg, legendary teacher and researcher (who, sadly, passed away during the editing); Jim Pawley, editor of several editions of the Handbook of Biological Confocal Microscopy; the famous and now dispersed New Zealand team of Mark Cannell, Christian Soeller, and David Baddeley; Robert Hoffman, pioneer of whole-animal imaging in cancer research; Andreas Schoenle and Christian Eggeling on STED nanoscopy, and many more famous participants in this field. All the contributors are at the cutting edge of their field.