This title is one of six making up Pack E, for Stage 15 of the Treetops section of the Oxford Reading Tree. The books offer built-in progression for pupils aged 7 to 11 and are specially written for children who need the support of carefully monitored language levels. The stories are accessible, motivating, and humorous, and the series is organized into Oxford Reading Tree stages (from Stage 10 to Stage 16), with each stage introducing more complex narrative forms, including flashbacks and changes in viewpoint; descriptive writing; extended reading vocabulary; and more pages, more text, and fewer illustrations.