A wonderful story interwoven with some very appropriate, not-so-gentle points about gender preconceptions.

A dying wizard unintentionally passes on his wizardness to 8th daughter of an 8th son (he thought it was an 8th son). As she grows lots of preconceptions about gender roles are examined, challenged and discarded.

Lore (and even law) can and should change as we all grow and learn together.

A great line: I can see you've been getting ideas below your station. - Granny Weatherwax to Eskarina when she forgot herself and blindly accepted there were ~any~ places she didn't belong because she wasn't a man.