Photosynthesis - the capture of light energy by living organisms - is a simple enough concept, but its investigation draws on the resources of disciplines right across the field of science. Using a time framework, this book covers photophysics, photochemistry, electron transport, ATP formation, metabolism and physiology. The increasing time-scales correspond to the concentric arrangement of thylakoids, chloroplasts, cells and tissues. This book should be of interest to advanced undergraduates and postgraduates in biology, biochemistry and microbiology.