Traza
In Venezuela, this is the name for a silverfish, a small wingless insect about 15 to 20mm long with a silvery-gray color that feeds on paper and books. The name comes from its resemblance to armored river fish that stick to rocks, called corronchos or cascarrones (Corronchos are flat, scaly catfish common in South American rivers).
The trazas are going to eat those books, we need to clean them somehow because they are eating them.
Automatically translated from Spanish
Venezuela