A nearly disastrous car wreck in Germany launches 12-year-old Gabriel Zanadu, Alexander, his 14-year-old brother, and their two dogs, Thunder and Lightning, into a sinister adventure near the famous German castle Neuschwanstein.Unexplained eavesdropping, death threats, and heart-pumping danger drag Gabe, Alex, and the dogs into the clutches of a little-known foreign terrorist network. After they are kidnapped by the terrorists, the scraped and bruised boys battle their captors in u...