The Story of the Amulet

When Cyril, Robert, Anthea, and Jane rescue their old friend the Psammead from a pet shop, the grateful fairy leads them to half an amulet which has the power to take them back in time in search of the other half -- and the complete amulet can give them their heart's desire But magic can cause problems in real life, especially when the Queen of Babylon visits the children in London.