Grade 3-6-Because their mother needs a quiet place to finish her novel, the three Davis children find themselves spending the summer in a Victorian house on a small island off the coast of Maine. A mysterious letter from their elderly Great Aunt Mehitabel, absentee owner of Lonely Island, helps the siblings discover Fafnyr Goldenwings, a three-headed dragon that sleeps deep inside a cave on Drake's Hill. It can be prickly and fussy, but takes pains not to frighten the children, assuring them at once that it is a vegetarian. Over the course of the summer, each head awakes in turn and tells a story about children that the dragon had helped. It drove away invading Mongols from a Chinese girl's village, saved an orphaned boy from the clutches of evil pirates, and rescued a brother and sister marooned on a desert island-but only after the siblings learned to think for themselves. The children learn that the sister in the last story was actually a young Aunt Mehitabel, who offered the dragon a sanctuary on Lonely Island. The Chinese story has the tone of European tales of exotic Cathay and the other two are reminiscent of earlier children's books, when adventures were more jolly than harrowing. This smoothly written confection may be a tad bland and predictable, but it goes down as easily as an entertaining, light read. Margaret A. Chang, Massachusetts College of Liberal Arts, North Adams - from Amzon