3,5/5. Good audibook, the narrator was great and the story itself was fun. Not the most original middle grade «plot», but I like the setting of an unplugged retreat for children and the morale it try to pass on, with subtility to not overtake the story, but still present. The characters were a bit strong on stereotypes, but it didn't bother me much. Overall an entertaining and enjoyable middle grade book with a some depth to it, that compensate for the low originality. I like it!