A red silk bookmark stuck out of many of the books.
In this sentence above, what does "stuck out of "mean?
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Sign up to join this communityMany of the books have bookmarks in them indicating where the reader had got to when reading them – these bookmarks are made of red silk and protrude beyond the book itself to indicate where they are.
See an example: https://s3.amazonaws.com/libapps/accounts/11428/images/Book-Bookmark.jpg