Those damn termites………
If you live in the South you should be familiar with termites, Subterranean termites live in the ground and make their way into your home or structure in a manner of ways including the first picture above. Once they are inside they will forage and look for food, that could be the studs in your home or books like the second picture above. Termites are always looking for food and they will eat anything that contains cellulose. Never store books or papers in the garage on the expansion joints or above any crack in the slab. I recommend a yearly inspection for termites and I also suggest that you walk around your home monthly to take a quick glance at the structure.
ProBest Pest Management offers Free Termite Inspections (this offer doesn’t include WDIIR or Wood Destroying Insect Infestation Reports needed to sell your home)