Sakkara, , HarperCollins Publishers, Michael Carroll,Children’s / Teenage fiction: Action and adventure stories,Children’s / Teenage fiction and true stories, Superhero;adventure;villains;flying;secret hideway;superpower;boys;battle;strength;megalomaniac;mystery;heroes;evil;invisibility,, , United Kingdom, en-GBhttps://www.harpercollins.co.ukSuperhero;adventure;villains;flying;secret hideway;superpower;boys;battle;strength;megalomaniac;mystery;heroes;evil;invisibility, [BLURB],[CITY],,books, ebooks, biblet, Book2look