What I loved: This is a fun book that teaches new big words to children in a fun way. I love the twist of the dictionary being the one to tell the story. Although they prank each other, there is ultimately love between his brother and himself, and I love the good natured jokes/pranks that leave both of them smiling. I also appreciated the nice things Calvin does during the day for others, such as standing up for a girl on the bus.
What left me wanting more: As a small point, I wasn't a huge fan of the revenge Calvin plays on his brother for the milk joke - he dumps a glass of water on his sleeping brother. I think a better lesson would have been to not play revenge, but they both do laugh about it and it ends with family as the word of choice.
Final verdict: CALVIN GETS THE LAST WORD is an overall cute book about finding the right word and teaches new big words in the process.