Book was a proposed or discussed emoji-style concept representing a generic printed book, but the exact standalone candidate name "Book" did not become a distinct officially approved emoji separate from the existing book-related emoji set. Unicode and platform discussions around literacy, education, reading, and school subjects have long overlapped with approved symbols such as Open Book, Closed Book, Green Book, Blue Book, Orange Book, and Notebook. As a lost or redundant candidate, Book is best understood as a broad concept that may have been considered unnecessary because multiple more specific book emojis already covered similar meanings.
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Emoji History The emoji code/ image log of changes.
This emoji was one of the "suggested emojis" the Unicode group unveiled in June 2014 [article], however, it has been, and still is, up to the companies who support emoji in their operating systems to provide not only images but also an algorithm to replace the emoji code into the emoji image.
