This book pushes the purposes and properties of the rarest photographic film on the planet to its scientific and conceptual limits. British documentary photographer, Edward Thompson, set out to explore the boundaries of perception, whether they were things outside our visual spectrum or events that went unnoticed or unreported. From researching the original Kodak advertisements, expert interviews and scientific journals, Thompson has gathered an extensive archive and used some of the last 46 dead-stock rolls of Kodak Aerochrome Infrared film in existence to reveal the unseen.