Book excerpt: Ancient magic, hidden worlds and bloodthirsty tribes: there is only one Luke Challenger, and he's back for a third, unforgettable adventure. Having braved the Lost World and travelled 20,000 leagues beneath the sea, Luke Challenger is back, and facing his hardest challenge yet... the terrifying Sons of Destiny are closing in on the location of the legendary Spear of Destiny - an ancient weapon that grants the power of invincibility, which would help the Sons succeed in their fearsome plans for world domination. In a deadly race against time, Luke and his cousin Nick must track down the fabled King Solomon's Mines where the spear is believed to have been hidden...before their enemies can find it. the fantastic third instalment in the Challenger series revisits Sir H. Rider Haggard's King Solomon's Mines in a way that will grip a whole new generation of readers.