Silverfish don’t spread disease, but they destroy property and can cause a great deal of damage. They prefer to live in dark areas where they won’t be disturbed. You may find them lurking in roof and wall cavities, behind skirting boards, under carpet edges, in books and in stored goods. Key indicators are books coming off their spines (as silverfish have eaten the glue that binds the paper to the cover), stained fabrics and holes in packaging.