librum is the accusative singular, the thing the action is being done to. This is used instead of liber because liber would be used as the thing doing the action.
liber legit -> 'the book reads' versus librum legit -> 'he/she/it reads the book'
Va bene l'accusativo singolare. Ma la pronuncia è cattiva.
Bcz books are mentioned and they act as object. Therefore librum is used as singular form of liber (it will turn into librum)
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can i say
Having the tu make the Latin more emphatic but is not needed since the subject's person and number can be seen in the verb ending.