1) Finnegans Wake, by many 2) Gathering dust in the library 3) Illiterate 4) Lacking in knowledge 5) Lacking knowledge 6) Like a brand-new book 7) Like books collecting dust 8) Like junk mail 9) Like junk mail, usually 10) Like much bulk mail 11) Like much junk mail 12) Like much spam 13) Like new e-mails 1) Uninformed 
• (a.) Not read or perused; as, an unread book. • (a.) Not versed in literature; illiterate.
[adj] - not having been read 2. [adj] - not informed through reading
adjective not informed through reading; `he seems to have been wholly unread in political theory`- V.L.Parrington
not read, as a letter or newspaper. · lacking in knowledge gained by reading; having read little or nothing: She was intelligent but unread. · having little knowledge of a specific field: a brilliant chemist unread in biology.