I bought a car full of second-hand books, the quality of which is unsafe. What products or materials should I use to eliminate bacteria and viruses in old books?

It is not easy to do this work at home alone. Museums and libraries usually use fumigation, such as ethylene oxide sealing fumigation, freezing, such as-15℃ freezing, and ultraviolet disinfection (this is used in hospitals and has an aging effect on cultural relics and ancient books). There is nothing special at home. Sunlight can kill some bacteria through ultraviolet rays in the sun. In addition, drying in the sun will inactivate the mold. After that, dust removal is a relatively simple and practical way for non-professional cultural relics workers or people outside the health industry.