What is the author's style in Belles on Their Toes by Frank B. Gilbreth?

This book is written by two of Lillian's children. They wrote from their own experiences as well as those of their siblings.

The Foreword is written in third person. It's a formal introduction to the book. As the main part of the book begins, the story switches to third person with a personal perspective, highlighting the story from the children's point-of-view. The language is simple to read, yet has enough of a variety in vocabulary that it can expand a reader's vocabulary. The more complex words are used in context so a reader can easily understand what is going on and what the authors are trying to say.