Tron by Brian Daley

In this science fiction novel, a computer programmer is digitized and transported into a virtual world inside a mainframe computer, where he must navigate a digital landscape filled with dangerous programs and oppressive control by a malevolent artificial intelligence. As he allies with other digital entities, he embarks on a quest to overthrow the tyrannical system, using his skills and ingenuity to survive and ultimately restore freedom to the virtual realm. The story explores themes of technology, identity, and the struggle for autonomy within a digital universe.