Meet Jo Nesbø, the Norwegian author of detective stories that adults read all over the world. And this is the first in a series of books for children written by Jo Nesbø, the Norwegian author of detective stories that adults read all over the world. And this is Dr. Proctor, a crazy (in a good way) professor, around whose inventions crazy (in a good sense) events develop in children's books written by Jo Nesbø, a Norwegian author of detective stories that are read by adults all over the world. And this is Lise, a girl from Cannon Street in Oslo, the owner of short pigtails and a neighbor of Dr. Proctor, around whose inventions... well, you understand. And this is Bulle, Lise’s new friend, and also, probably, the smallest, reddest, smartest and most cheerful boy on our planet. And this is a new invention Dr. Proctor, which Bulle volunteered to test on himself: magic powder. For the first time in Russian!