Antonyms for closed books

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR CLOSED BOOKS

These early volumes of Stevenson, while doubtless well known to lovers of his works, are closed books to most casual travellers.

Left of the Emperor are five desks; with five closed books lying on the top of each.

She closed books at last, and sent them out into the garden to play before their early dinner.

It is in this way that the trained clairvoyant is able to read from closed books, sealed letters, etc.

The prophets say the closed books shall be opened, the dead shall arise, darkness be turned into light; nothing be concealed.

Some recite with open books, while others are prepared to answer the questions with closed books.

Reading from closed books, sealed envelopes, etc., and how it is explainable.