The Wynd Family Series by Stephen Krensky

The magical Wynd family becomes involved with dragons needing help in recovering treasure lost centuries before at the bottom of a lake. Sequel: The Witching Hour..

The Wynd family pits its forces against a group of witches with a ghastly plan to turn the town's children into monsters. Sequel to The Dragon Circle..

While visiting their Aunt Celia in Boston, the five Wynd children are determined to foil the army of ghosts intent on helping an unscrupulous developer acquire some of the best property in the city. Sequel to "The Dragon Circle" and "The Witching Hour".