Guest sign-in books add a quaint touch to a lobby’s front desk, but they are also an inefficient way to keep track of the people spending time in the building. Handwriting is often illegible. The books get moved. People sign in but don’t sign out, or sometimes they manage to sneak past the sign-in process all together. And if there is an emergency that required building evacuation, will someone remember to grab the book so everyone inside the building can be accounted for?