Author: Smart, Jamie
General fiction (Children's / Teenage) 
Published 07/10/2021 by David Fickling Books in the United Kingdom as part of the Flember series 
Paperback | 
Boy-inventor Dev and his giant robot bear, Boja, return for a third madcap adventure, in the high-tech, mega-modern city of Prosperity. There's a battle going on for who will control the magical power of Flember . . . will Dev and Boja find themselves fighting for the right side?