The famous American writer Suzanne Collins, author of The Hunger Games, wrote a series of books about the amazing adventures of Gregor Terrestrial, creating an atmospheric and very memorable world. Eleven-year-old Gregor looks after his little sister with the funny nickname Barefoot. One day, Barefoot, running after a rolled ball, climbs into the hole behind the washing machine - and disappears. Gregor, of course, follows her. So the children find themselves in the magical world of the Underdark. There live pale-skinned people who have made an alliance with huge talking cockroaches and fight with rats, fly on bats there and remember an ancient prophecy - it mysteriously concerns Gregor, Sandals and their long-lost father. So it begins the first book in the series of chronicles of the Underdark.