Graphesis provides a descriptive critical language for the analysis of graphical knowledge. In an interdisciplinary study fusing digital humanities with media studies and graphic design history, Drucker outlines the principles by which visual formats organize meaningful content. Among the most significant of these formats is the graphical user interface (GUI), the dominant feature of the screens of nearly all consumer electronic devices. Because so much of our personal and professional lives is mediated through visual interfaces, it is important to start thinking critically about how they shape knowledge, our behavior, and even our identity. Drucker makes the case for studying visuality from a humanistic perspective, exploring how graphic languages can serve fields where qualitative judgments take priority over quantitative statements of fact. Graphesis offers a new epistemology of the ways we process information, embracing the full potential of visual forms and formats of knowledge production.