Thunderbirds, written by one of the key original creators, Alan Fennell, is a tie-in book based on the iconic 1960s Gerry Anderson television series featuring Supermarionation. The book follows the high-tech, futuristic rescue operations of International Rescue, a secret, philanthropic organization run by the wealthy Tracy family and their five heroic sons from their remote base on Tracy Island. The core narrative centers on the use of their spectacular, advanced rescue vehicles, the Thunderbirds, which include rockets, submarines, and specialized machines, to save people from extraordinary disasters around the world. The book, often featuring original artwork or stills from the show, captures the thrilling, gadget-filled atmosphere of the series. It emphasizes themes of bravery, family loyalty, scientific ingenuity, and the importance of humanitarian aid. The book serves as a nostalgic and action-packed extension of the television show, celebrating the futuristic vision and the heroic, moral conduct of the Tracy family.