Hal Junior lives aboard a futuristic space station. His mum is chief scientist, his dad cleans air filters and his best mate is Stephen 'Stinky' Binn. As for Hal ... he's a bit of a trouble magnet. He means well, but his wild schemes and crazy plans never turn out as expected! Hal Junior: The Secret Signal features mayhem and laughs, daring and intrigue ... plus a home-made space cannon! Written for independent readers aged 9+, The Secret Signal will appeal to kids with a sense of humour and a taste for adventure.