Books like Igraine the Brave

Igraine dreams of being a famous knight like her great-grandfather, but castle life is boring. Until the nephew of the baroness-next-door plans to capture the castle for their singing spell books. At the moment of the siege, her parents mistakenly turn themselves into pigs. Aided by a Gentle Giant and a Sorrowful Knight, Igraine must be brave, and save the day -- and the books.