These books are great resources for learning about group theory. To use them, start by skimming through the table of contents to get an overview. Then, read the chapters in order for a structured learning experience. When reading, you can take notes to better understand the concepts. As for storage, keep them in a dry and cool place to prevent the covers from getting more soiled and to protect the pages. Avoid bending the pages or applying too much pressure on the bindings to keep them secure. If you notice any dust on the books, gently wipe them with a soft cloth.