The Velvet Room — Zilpha Keatley Snyder

Robin was always "wandering off" (her mother's words) to get away from the confusion she felt inside her. It was not until Robin's father found a permanent job at the McCurdy ranch, after three years as a migrant worker, that Robin had a place to wander to. As time went by the Velvet Room became more and more of a haven for her--a place to read and dream, a place to bury one's fears and doubts, a place to count on.
The Velvet Room, first published in 1965, was a Junior Library Guild selection, and part of Scholastic Books' Arrow Book Club.