If you were gripped by the urgent, singular mission of reconstructing an identity in Who?, you'll be equally riveted by Alfred Bester's The Demolished Man. Here, police prefect Lincoln Powell is locked in a relentless hunt for a murderer in a world where telepathy complicates every move. The narrative relentlessly drives forward, keeping you on edge as every clue and twist brings the characters closer to their goal.

If you found the psychological complexity and questions of self and authenticity in Who? compelling, Solaris will draw you in with its haunting exploration of memory, perception, and what it means to be oneself. The protagonist, Kris Kelvin, faces mysterious manifestations aboard a sentient planet, forcing both him and the reader to question the nature of identity and reality.

If the realistic approach to science and technology in Who? fascinated you, you'll appreciate the hard science and rigor of The Forever War. Haldeman’s portrayal of time dilation, military technology, and the alienation of a soldier returning to an unrecognizable world is grounded in solid scientific concepts, giving the narrative a believable and immersive edge.

If you were drawn to the atmosphere of suspicion and the themes of espionage in Who?, you’ll be captivated by The Manchurian Candidate. The story’s chilling exploration of brainwashing, hidden agendas, and political manipulation keeps you guessing about who can be trusted—mirroring the uncertainty that permeates Budrys’s novel.

If Who?’s contemplation of what defines a person and the boundaries of selfhood intrigued you, The Stars My Destination will enthrall you with its existential journey. Gully Foyle’s transformation—from a vengeful survivor to a near-mythic figure—forces readers to ponder the limits of identity and the nature of personal change, all set against a backdrop of relentless action.