Moncanto Mystery

Jamee Holifield, Jessica Edmonds, Whitney Desautels, David Yancey

Welcome to Moncanto Mystery. Your goal is to use your knowledge and skills to solve the mystery. You will need to keep a sharp eye out for clues, and you might even want to have paper handy to write down information that might be important later. Good luck!
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Coming home from school today you find a pack of letters with your name on it lying on the dining room table. The letters are all addressed to you, and have your aunt's name on the return address. Something is strange about them though. They're all dated differently, but they appear to have all arrived at the same time.
Open the first letter