Book excerpt: Simon and Cat are stuck in the modern world, determined to find their way to the kingdom - but it soon becomes more dangerous than they could have imagined. Meanwhile, in the kingdom, the Druid is keeping secrets from Dora and Jem. Should they try and follow him to the mysterious Empire of Akkad, where there might be dragons . . . ? Join the fearless foursome once more as they cross worlds in a race to track down the next piece of amber.