A collection of printed literary works in a flexible and often less expensive cover, primarily focusing on the study of environmental sciences, a multidisciplinary field of science aiming to solve complex environmental issues. This category may also extend to include spoken-word adaptations of these works in the form of audiobooks, as well as calendars and other supplementary materials related to the subject. Despite the various formats, all items within this category share the common theme of being educational and informative resources in the field of environmental sciences.