HeartseaseBook - 1969 | 1st American ed.
At a future time in England when anyone knowledgeable about machines is severely punished as a witch, four children dare to aid in the escape of a "witch" left for dead.
Publisher: Boston, Little, Brown 
Edition: 1st American ed.
Branch Call Number: J
Characteristics: x, 223 p. illus. 21 cm.