Stella Saxby, the sole heir to Saxby Hall, must protect her inheritance from her malevolent Aunt Alberta and her enormous owl. Stella faces the formidable opposition of her aunt, who is determined to seize the estate through any means necessary. Stella's only hope lies in a secret, slightly spooky weapon she possesses, which she must learn to wield against Alberta's greed and cruelty.

This book is celebrated for its signature blend of humor and heart, characteristic of David Walliams's writing. Readers often praise the engaging plot that keeps young audiences captivated, with the eccentric characters and unexpected twists contributing to its appeal. The story's ability to balance moments of genuine peril with laugh-out-loud comedy makes it a popular choice for read-alouds and independent reading alike. Its themes of resilience and the triumph of good over evil resonate strongly with its target audience, solidifying its place as a beloved children's story.