If you loved 'Mirror Image' for its psychological depth and duality themes, you might enjoy 'The Silent Patient' by Alex Michaelides. It’s a gripping thriller that plays with perception and identity, much like 'Mirror Image' does. The unreliable narrator and twists keep you guessing until the very end—I couldn’t put it down!
Another great pick is 'Dark Matter' by Blake Crouch. While it leans more into sci-fi, the exploration of alternate selves and the choices that define us feels eerily similar. The pacing is relentless, and the existential questions it raises lingered in my mind for days. For something more literary, 'The Double' by Dostoevsky is a classic take on doppelgängers and internal conflict, though it’s a heavier read. Lastly, 'Recursion' also by Crouch digs into memory and reality in a way that scratches that same itch.