What is the author's style in Ida B: . . . and Her Plans to Maximize Fun, Avoid Disaster, and (Possibly) Save the World by Katherine Hannigan?

This story is told from a first-person subjective point-of-view. It's told from the viewpoint of Ida B. Since it is subjective, the readers gain insight into Ida B.'s thought processes and reactions to events surrounding her. For instance, when her kindergarten teacher calls her Ida, she says that she only raised her hand part-way in response since the teacher didn't use her full name.

While the story is generally told in a linear manner, there are flashbacks to previous times such as her kindergarten experiences. She also comments on the fact that she had to go back to school before the reader discovers that her mother is ill. This suggests that the story is written from Ida B.'s point-of-view after all the events occurred.