These books are great resources for those interested in the fields of senses, skin, and innervation. To use them, simply open the book to the topic you're interested in and start reading. When handling the books, make sure your hands are clean to avoid soiling the pages. To keep them in good condition, store them in a dry and cool place away from direct sunlight. Avoid bending the pages or covers. If there are any loose pages, you can use a little glue to reattach them gently. Since the dust jackets are a bit worn, handle them with extra care to prevent further tearing.