Expository text is usually only information- based text, so a recipe, is expository, since it gives you information and directions,a report, is expository, since it contains information on what you had read, history is expository since it has information from the past, and advertising is expository since it gives information on a certain product or service, therefore a novel, probably isn't unless i misread your question, because it is not based on any validated information, rather it is made up and cannot be cited, hope i was helpful and have a good day!