Booklice or kayapaya in Malay, are tiny, soft-bodied insects that commonly infest environments rich in books and papers. Despite their small size about booklice size of 1 to 2 mm, they can cause significant damage over time. They thrive in humid environments by feeding on molds and fungi that grow on organic materials.

Psocids (order of psocoptera), or booklice, prefer to hide in enclose areas and other damp spots. Environment that are relatively humid are perfect location for these tiny bugs, psocid to infest and thrive.

Book lice or psocids, are tiny wingless insects that often disregard. They can cause significant damage during infestation in homes, libraries, archives, and environments with books, papers or organic materials. Despite their name, they are not true lice but are often mistaken as pests because of their similar habits.