K-Gr 1–When Ida starts school, she brings along her invisible friend, as do many of her peers. Each one embodies some aspect of the child it has bonded with. In Ida's case, it's her anger. As winter flows into spring, Ida realizes that she is the only child still bringing her special friend to school. When Katya teases her about Dotty, Ida (Dotty) shoves her and gets into trouble. Staying after school, Ida discovers that her teacher also has an invisible friend she still brings to school. Denos's illustrations subtly show the characters and the seasons changing, and the pressures of growing up. The text is best suited for one-on-one reading as the pictures have hidden nuggets of information for those who look carefully. This enjoyable tale of maturing at one's own pace and on one's own terms will resonate with children and parents alike