What can't we find in literature textbooks?

For most readers, the idea of ​​literature begins and ends with school textbooks, and later, for various reasons, people read very little. Literature school textbooks form literary taste, certain criteria for understanding and evaluating literature. No matter how much those textbooks try to make them modern, comprehensive, attractive, a lot of things are still left out of those books. What can't we find in literature textbooks? Literary critics Hayk Hambardzumyan and Arkmenik Nikoghosyan discuss.