Book excerpt: From the #1 New York Times bestselling author of The Dangerous Book for Boys comes the long-awaited sequel – another action-packed adventure guide featuring full-color illustrations, perfect for dads, grads, and boys of all ages. The Double Dangerous Book for Boys is a treasure trove of the essential activities and skills that have defined generations of boyhoods, from building a treehouse to fishing to finding true north. Designed with the same nostalgic look and feel as the first book, this companion volume includes more than 70 new chapters and important skills, fascinating historical information, and captivating stories, including: How to pick a padlock Making a Flying Machine Tying a Windsor Knot Advice from Fighting Men Questions About the Law Chess Openings Making Perfume Maps of Historic Empires: British, Ottoman, Genghis, Persian, Medes, Babylonian, Alexander Great Speeches Forgotten Explorers How to Wire a Plug and Make a lamp Writing a Thank You Letter Polishing Shoes Parents looking to reduce screen time and rediscover the great outdoors can use this book to fill weekend afternoons and summer days with wonder, excitement, adventure, and fun—learn to build go-carts and electromagnets, identify insects and spiders, and fly the world’s best paper airplanes. This charming and practical guide, packed with hundreds of full-color charts, maps, diagrams, and illustrations, will ignite the imagination and stimulate curiosity, and provide grandfathers, fathers, sons, and brothers the opportunity to deepen their bonds. Conn Iggulden has at last put together a second wonderful collection that is the essence of boyhood.