"Cybertext: Perspectives on Ergodic Literature" is a seminal work by Espen J. Aarseth that explores the concept of ergodic literature, which requires significant effort from readers to navigate and interpret the text. This type of literature often involves non-linear narratives and interactive elements, challenging traditional reading practices. Aarseth categorizes various forms of cybertext, including digital narratives and hypertexts, emphasizing how they differ from conventional books. He argues that these texts engage readers in unique ways, transforming the reading experience into an active process of discovery and interpretation, rather than passive consumption.