crack a book

== English == === Verb === crack a book (third-person singular simple present cracks a book, present participle cracking a book, simple past and past participle cracked a book) (informal) To open up one's books, especially in order to study. ==== Usage notes ==== The article a is not used exclusively: often it is replaced with the or a pronoun, for example, "crack the books" or "crack some books". This idiom is also sometimes used without an intermediate determiner, e.g. "Cracking books is not optional in this class." === See also === hit the books