There are several themes in Clements' work. In my mind, I think that most overwhelming theme is the relationship between language and power. Nick and Mrs. Granger have a battle which is constructed over the use and application of language. In the final analysis, the power struggle between both is rooted in the control of language. When Nick tries to get underneath her skin, Mrs. Granger gives the assignment of examining word roots in the dictionary. This act reflects her control over language, and in the process, her power over Nick. Once he invents the word "Frindle," he begins to assert his power over her and the society at large through the control of language. The idea of being able to control language and assert power through it is a theme of Clements' work.