The beaver was once almost extinct in Europe but, thanks to successful reintroduction, it is now again a viable species. As a result of cooperation between researchers in several countries, a new book is now being produced which will cover the results and effects of the restoration of beaver populations in northern Europe.The contents will include the history and biology of both the Eurasian and the North American beaver species in Northern Europe. New data on beaver behavior, the relationship between the beaver and its predators, and development of local beaver populations will be presented. There will also be results of studies on the beavers' influence on landscape, vegetation, soil and other aspects on both terrestrial and aquatic ecosystems. Finally, there will be chapters on conflicts and benefits related to beaver and humans, and a forecast of the future of the beaver in Northern Europe.