The term 'put on the books' is a phrase used to describe the process of officially enacting or entering something into law. The two crossword solutions for this phrase are 'enacted' (7 letters) and 'ENACT' (5 letters). Enacted is the past tense of the verb 'ENACT, ' which means to make something into law. ENTER (5 letters) is another word for ENACT, as it is the process of officially entering something into law.