An old Key on a open book

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Photo credit: © Giuseppe Anello / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: book, castle, code, deep, enigma, esoteric, fiction, french, hidden, intellectual, key, knowledge, learning, literature, lock, locked, magic, mystery, obscure, open, page, paper, private, reveal, row, secret, stored, symbol, symbolic, universities, unspoken, words, writing, written