Bark and ambrosia beetles belong to a group of insects typical of forest habitats, boring characteristic galleries under the bark and within the wood. Because bark beetle species are very similar to each other morphologically, the identification of these insects is particularly complicated. The purpose of this handbook is, hence, to provide a tool useful to identify the main bark and ambrosia beetles occurring in European forests through the host tree and shape of their mating systems. It is a very well done handbook, useful to recognize on the field the signs of these insects; it can be helpful, as well as the passionate coleopterologists and the students of Forest and Environmental Sciences and Agrarian Sciences.