College textbooks are educational books used in higher education to support learning in various subjects. They provide essential information, theories, and concepts that students need to understand course material. Textbooks often include exercises, illustrations, and references to help students grasp complex topics. These books can be expensive and are typically updated every few years to include the latest research and developments in a field. Many students also use digital versions or rental services to save money. Some popular subjects for college textbooks include mathematics, science, literature, and history.