This title is part of Bug Club, the first whole-school reading programme to combine books with an online reading world to teach today's children to read. In this Year 5 Blue A (NC level 4b) fiction novel … Trolls are being smoked out of their mountain home so that greedy Mr Rockybuster can mine his precious Gemgold. Can Ulf rescue the trolls in time before they get blown up? The future of the RSPCB depends on him …