In the UK the equivalent is “script”. Although we might talk of being “off book” (i.e. knowing your lines) “the book” is a very specific copy of the script kept by the Deputy Stage Manager with all the actors' and technical cues marked in it. read more
Script. It’s also referred to as the ‘book’ - when you get to the point in a theater production when the actors are able to get through the play without reading the lines it’s called being ‘off book’. read more