Booklice (Psocoptera) are very small (less than 1.5mm in long) but not true lice. While they resemble lice in size and shape, booklice feed only on fungi. mold, together with dried or decaying plant and animal materials.
They become particularly abundant in dark, damp places such as basements, storerooms, homes closed for the summer, and closets during the warmer periods of the year. If you find them in grain or other stored food products, it is an indication of high humidity which encourages mold growth.
Booklice may be found under wallpaper, in furniture, along the sides of windows or on window sills around potted plants. Booklice do not bite, transmit disease, or damage food or fabric, but they can be very annoying when present in large numbers.
Treatment for book lice
The best way to control booklice is to eliminate moist environmental conditions. Reducing the humidity in your home will eliminate the mould on which the booklice feed. Clean the infested areas thoroughly, if possible, vacuuming all surfaces and cracks/crevices etc.
Taking as many objects as possible outside and drying them in the sun on a bright day. Under no circumstances should toxic pesticides be used to treat your home as it will just give you a short term relief. Remember that, sanitation is the best approach to eliminate this pest without any harmful chemical.