The term "page-turner" typically refers to a book that is so captivating that it encourages the reader to quickly turn the pages. However, not all books are page-turners. Some books can be dull, boring, unexciting, unappealing or slow-paced, which are antonyms for page-turner. Such books may lack a compelling storyline, interesting characters, or a gripping plot. Other antonyms for page-turner include uninspiring, unstimulating, unremarkable, tedious, monotonous or drab. These books fail to hold the reader's interest or leave them feeling unfulfilled. While not all books can be page-turners, it's essential to note that every reader has their preferences in terms of genres and styles.