Jonas was selected as the Receiver of Memories, a position responsible for preserving the community's history and memories. As part of his training, he was allowed access to the private chambers of the Giver, where he discovered a wealth of books containing knowledge about the past, emotions, color descriptions, and a broader understanding of the world beyond their community's controlled environment.
Jonas' surprise stemmed not from the presence of books but rather from the fact that he had been granted the privilege to read them. In the society portrayed in the novel, access to such information was highly restricted, and the possession of books was considered an act of rebellion against the rigid societal norms that suppressed individuality and diversity of thought.