Sunday, April 12, 2015

grammar - Types of books or Types of book?


can anybody tell me which one of these is the correct one? I have been searching all over the internet but I have still got no answer.




Types of books


Types of book




Answer



Both are correct, though types of books is more common, especially in American English. Here are links to frequency graphs of "types of book" vs. "types of books" in the Google Ngram Viewer:



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