Dickinson, Peter. <br/><br/>
The changes :  a triology / 
Peter Dickinson. 
 - London :  Victor Gollancz,  1975. 
 - 510 p. :  ill. ;  20 cm. 
<br/><br/>A triology comprising The Devil's children, Heartsease and The Weathermonger. 
<br/><br/><label>ISBN: </label>0575019077