The clue "Backbones of books" last appeared in the Newsday.com crossword on March 9, 2020. The correct answer for this puzzle is "spines", a 6-letter word.
Solution SPINES is 6 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is SPINES with 6 letters, and the shortest is SPINES with 6 letters.
No, "BACKBONES OF BOOKS" hasn´t seen a spike right now. Solvers are most interested in: gulp, Indian condiment, Expand, Unsettled and Upset.
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The solution is 6 letters long.