https://www.loc.gov/preservation/care/books.html
Proper Care and Handling of Books
Taking care when handling any collection item, especially functional items like books with flexing parts, is one of the more effective, cost-efficient, and easily achieved preservation measures.
Take proper care when handling books by:
- Having clean hands and a clean area to use the book
- Keeping food and drink away
- Removing the book from the shelf by gripping on both sides of the spine at the middle of the book (push in the neighboring book on both sides to get a good grip), instead of tugging at the top of the spine
- Not forcing a book to lie open to 180 degrees; instead, prop up the covers of an opened book to decrease the opening angle
- Not using paper clips, "dog ear" folding, or acidic inserts to bookmark pages
- Not using rubber bands, self-adhesive tape, any kind of "leather dressing," and/or glue on books
Proper Storage of Books
Good storage significantly prolongs the life and usability of books and includes:
- A cool (room temperature or below), relatively dry (about 35% relative humidity), clean, and stable environment (avoid attics, basements, and other locations with high risk of leaks and environmental extremes)
- Minimal exposure to all kinds of light; no exposure to direct or intense light
- Distance from radiators and vents
- Regular dusting and housekeeping
- Shelving books of similar size together, so that the face of the covers are maximally supported by the neighbors on each side
- Keeping upright shelved books straight and not leaning (storing books lying flat is also good)
