These Childcraft books are great for exploring art, music, science, and industry. To use them, simply open the pages and start reading. When handling the books, be gentle because the bindings are a bit loose. Try to keep them away from moisture to prevent more soiling and foxing. You can store them on a bookshelf in an upright position. And remember, even though there's some soiling and foxing, it doesn't affect your ability to read the content.