A new guidebook reaffirms boyhood in all of its politically incorrect glory. The frontispiece in Conn and Hal Iggulden’s The Dangerous Book for Boys says it all—a skull and crossbones boldly heralds adventure, treasure, and unbridled boyish fun. According to its English authors, this is a book for boys who want to be “self-sufficient and find their way in the stars.” It’s a delightful compendium of knowledge, life tips, building projects, games, and hands-on invention. At its heart, the book unabashedly reaffirms and celebrates the traditional moral leather that has guided untold generations of men in their voyage through life. ...