Skilled in Magic - Five on an Ancient Trail

Long-ago relics, ancient structures, one very dangerous mountaintop-and a puzzling key!
These things are connected somehow, a mysterious trail of clues . . .
But a trail to what?
Driven by curiosity, and riding in a magical flying bathtub, the Delliks children set off on a long and dangerous journey. Julian, Lee, Maggie, Edward, and little Enid each have a magical ability, and together they possess the Five-as-one power-truly a force to be reckoned with should anything stand in their way.
Yet not even the Five are prepared for the surprises, wonders, and perils they encounter on their madcap adventure...
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Five on an Ancient Trail is the second book in the Skilled in Magic fantasy series for young readers. If you enjoyed the first instalment, you'll love this one.