Mr Mumbles, , HarperCollins Publishers, Barry Hutchison,Children’s / Teenage fiction: Horror and ghost stories, chillers, or other scary supernatural stories,Children’s / Teenage fiction and true stories, horror;mumbles;scary;darren shan;invisible friend;adventure;funny;imaginary;humour;kyle,, , United Kingdom, en-UShttps://www.harpercollins.co.ukhorror;mumbles;scary;darren shan;invisible friend;adventure;funny;imaginary;humour;kyle, [BLURB],[CITY],,books, ebooks, biblet, Book2look