This book provides dichotomous keys to identify pests, both vertebrates and invertebrates, that live in structures. Some pests cause significant damage to property or human health, termites, rats, wood boring beetles. Others are incidental pests that come in seeking shelter, food or water, such as bats, snakes, millipedes and lady beetles. All these can be id'ed based on indirect evidence of their presence, fecal pellets, nests etc. or by seeing the animals themselves immature or adult. Sweetman's book is an important diagnostic reference.