Third e-Book (Mission 10). The Power of Knowledge. Wise Willy’s Secret Manual is a comprehensive course for kids (aged 8+) on mindfulness and emotional intelligence. The course is packaged as a series of 12 e-books that teach life-changing skills to families through fun stories, interactive videos, practical activities and much more! Every e-book shares a unique lesson (or “Mission”) that progressively teaches kids how to feel happy, confident, and strong. Cheeky Wise Willy helps kids to develop