One rainy evening, a black cat knocked on the door of the lodge. The grandfather guard let an unusual guest in for the night, but the Black Cat did not manage to get enough sleep. After all, something is always happening in the residence! Someone is making noise, stomping loudly, playing with the intercom, and The Courier has also arrived with parcels. And the Black Cat has to decide everything. "The black cat is an assistant. Keep order in your residence " is: a little funny, a little touching story, Korean charm. ideal for joint readings with children or the first independent reading, for ages 6+, the book is the winner of the main prize of the 24th Changbi Good Picture Book Award, the first book in the series about the black helper cat.