Which of the following makes up the largest portion of the book publishing industry in terms of sales?

Name: Which of the following makes up the largest portion of the book publishing industry in terms of sales?
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Question

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Textbooks make up a significant portion of the book publishing industry's sales due to their high demand in educational institutions. While the other options may have certain niche markets or devout readers, they do not have the same level of widespread demand and sales as textbooks.

Which of the Following Makes Up the Largest Portion of the Book