Coming of Age

One of the primary themes that runs throughout the novel is growing up and coming of age. In some way, each of the characters learns lessons about growing up and dealing with responsibilities in life. Primarily, Bobby's invisibility forces him to see life, his parents and the actions of others from a different point of view. When Bobby was visible, he felt invisible anyway, so when he becomes visible again, Bobby appreciates his life, his parents and his relationships in a more mature manner.

Even Alicia, Bobby's parents and Alicia's parents go through a transformation when they are working together to help Bobby overcome his invisibility problem. While Bobby and Alicia start out as friends, their relationship has blossomed into a budding young love story by the end of the book.

Friendship

The underlying theme of the novel is friendship. The novel talks about how Bobby...