Sure. 'Commonplace writing' can be an antonym. A novel book is often unique and stands out, but commonplace writing is ordinary and lacks the distinctiveness. For example, daily journal entries that are just about normal routines are commonplace writing compared to an imaginative novel book.
'Overused literature' might also be considered. A novel book brings fresh ideas and stories. However, overused literature refers to works that have been read and reused so many times that they lack the newness. Classic stories that have been adapted too many times without much new input can fall into this category.
An antonym could be 'old manuscript'. A novel book is new and often refers to a work of fiction in a modern printed form. An old manuscript is something written by hand in the past, which is quite different in terms of age and form.
Biographies. A biography is about a real person's life, based on facts and research. It's not a made - up story like fiction. It details the real experiences, achievements, and relationships of an individual.
For book, there's 'libretto' which is mainly for the text of an opera but still a form of book. Another one is 'ledger' which is more like a record - keeping book. For novel, 'saga' is a great alternative as it implies a long and involved story like a novel, and 'epic' can also be used to describe a grand and long novel - like story.
Journal. A personal or academic journal can be a book. Academic journals contain research papers, and personal journals are like diaries but can be published as books. These are not novels as they are more about recording events, ideas or research findings.
Ordinary. Novel implies uniqueness and newness. Ordinary things are common and lack the novelty. For instance, a novel invention is extraordinary compared to ordinary, existing things.
A traditional novel without illustrations could be considered an antonym. Since a graphic novel is highly visual with pictures and text combined, a regular novel that is just text - based is quite the opposite.
Gripping. It holds your attention tightly, like a thriller that makes you eager to turn the pages to find out what happens next.
Classic, conventional, orthodox. In literature, a 'novel' often represents new ideas or forms. 'Classic' works are from the past and not new. 'Conventional' and 'orthodox' imply following the established norms rather than being novel.
Some antonyms for 'novel' could be 'conventional', 'ordinary', or 'typical'.