Worlds of Exile and Illusion: Rocannon's World / Planet of Exile / City of Illusions (Hainish Cycle, #1-3)

by Ursula K. Le Guin

children with subnormal minds are brought here and keyed into the psychocomputers, so that even they can share in the great work. Those are the ones the ignorant call toolmen. You came here with Strella Siobelbel, prech Ramarren?”