TAJIK LANGUAGE BOOKS: Following this link will direct you to a subject-browse search of the KU Libraries Online Catalog where you can see all the books available on the topic of the Tajik language.TAJIK (aka Tajiki), Taajik and Farsi are very closely related Persian variants. The primary difference is that currently Tajik generally uses the Cyrillic script, rather than the Perso-Arabic script. LANGUAGE BOOKS: Following this link will direct you to a subject-browse search of the KU Libraries Online Catalog where you can see all the books available on the topic of the Tajik language.