Johnny And The Bomb by Terry Pratchett

Johnny and the Bomb is Terry Pratchett's hilarious time-travel adventure featuring a group of teenagers who discover a mysterious bomb in a skip and accidentally journey back to World War II. When they realize the bomb is set to detonate during the Blitz, they must navigate the chaos of wartime London to prevent disaster—all while trying not to alter history too drastically. Packed with Pratchett's signature wit, clever wordplay, and heart, this novel blends comedy with genuine emotion as the young protagonists grapple with the realities of war and the weight of their unexpected responsibility. Perfect for fans of humorous fantasy and time-travel tales, Johnny and the Bomb proves that even ordinary kids can change the world—sometimes literally. A standalone adventure that captures the magic of Discworld's storytelling without requiring prior series knowledge.