Eva Ibbotson writes for both adults and children. Her books for children, with their fantastic creatures, outrageous characters, dark humour and brilliant storytelling, have much in common with Roald Dahl's.
Which Witch was runner-up for the Carnegie Medal and The Secret of Platform 13 was shortlisted for the Smarties Prize. Her latest titles are The Star of Kazan and Journey to the River Sea.
She lives in Newcastle, UK.
http://en.wikipedia.org/wiki/Eva_Ibbotson