Strong as Hercules — Robin Buckallew

Volume 6 of the Leafy Tom Series. Phoebe, Ormond, and Alba set off for summer camp, ready to be just children for a couple of weeks. It seems like trouble wants to follow them even to camp. A rogue witch interferes with their summer vacation, and they travel to places they have never been, required to work through the labors of Hercules, unless they want to unleash terror on the world. Phoebe will learn new tricks of her amazing emerald and discover strengths she didn't know she had.