Did you know that Berlin is not only the capital of nightingales but also of wild boars? That marmot fat is said to possess miraculous healing powers, field mice can teach us to cope better with stress, and that there were not only Ostrogoths and Visigoths, but also East and West mice? Because a strange boundary runs through Germany. Biologist Josef H. Reichholf takes us into the hidden world of mammals in the tradition of David Attenborough, but not to tigers and elephants, rather to our native mammals. Full of surprising insights and anecdotes, this lovingly illustrated book by Johann Brandstetter sheds new light on our coexistence with wolves, foxes, beavers, and bats. A true pleasure to read.