Alex wants to convince his mom to let him have an iguana. He uses his creative ways and puts his arguments into writing. Each letter to his mom includes different reasons as to why he deserves this pet and why he would be a good owner. He promises to clean and feed it and always take good care of it. Alex and his mother write letters back and forth in which Alex tries to persuade her to let him have a baby iguana for a pet. The bright and lively illustrations show their complete opposite ideas of life with an iguana.