"Wall of Crystal, Eye of Night" by Algis Budrys is a science fiction novel written in the early 1960s. The story is set in a future where advanced technologies such as a new video system called EmpaVid allow for the manipulation of emotions and perceptions. It delves into themes of ambition, competition, and the consequences of human desire within a high-stakes corporate environment. The narrative follows Rufus Sollenar, a powerful businessman who has gambled everything on the success of EmpaVid. As he faces off against his rival, Cortwright Burr, Sollenar's journey intertwines with a mysterious advisory figure named Mr. Ermine. After a series of violent confrontations and revelations about Burr's dealings with Martian engineers, Sollenar's ambitions unravel, leading to an exploration of identity, reality, and mortality. Ultimately, Sollenar’s quest for immortality culminates in a tragic and ironic twist, as Ermine, who embodies the very system that Sollenar sought to control, finds his own unexpected transformation. The novel weaves a complex narrative examining the intersections of technology, human aspiration, and the uncanny facets of existence. (This is an automatically generated summary.)