This book is a story about the life of rats and mice - the most widespread human "companions." It is difficult to imagine the scale of the damage that this neighborhood brings us. Scientists have come to the conclusion: in order to successfully fight the pest, it is not enough to scatter the poison. You need to know your enemy well, be able to distinguish between species of rodents, study the features of their ecology and behavior, figure out: what allows synanthropic rodents to successfully exist next to people. Readers will be able to get acquainted with all these questions by reading the book.