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Christopher Ziegel (Larry Ziegel in the online book) is mentioned in the second book, when Greg talks about the "last name rule". He is said to be quite unintelligent. According to Greg, the "last name rule" means that if you have a last name that is higher on the alphabet, you are smarter.
- In the online book, he is the same as his book counterpart, the only difference is that his name is "Larry Ziegel"