What are the motifs in Castle in the Air by Diana Wynne Jones?

Feminism is one of the motifs in "Castle in the Air" by Diana Wynne Jones. In keeping with stories of this nature, women are often portrayed as pretty possessions without any rights. Abdullah has never believed this and is appalled when he hears others speak of women this way. This is especially true when Abdullah has an audience with the Sultan, who is also Flower-in-the-Night's father. The man has no respect for women, including his own precious daughter. Abdullah tries to defend women but to no avail.