Mallory McDonald has four big problems.Problem #1: The boy she likes doesn't like her back.Problem #2: Her brother is mad at her.Problem #3: Her dad is upset about her math grade.Problem #4: Her brother's dog won't leave her alone, and he smells terrible!When it comes to boys, brothers, dads, and dogs, only one thing is certain: Mallory is about to become an expert!A NOTE FROM MALLORY MCDONALD:Welcome to my official guide to boys, brothers, dads, and dogs. Hopefully, it is not the only guide available because THESE ARE FOUR VERY COMPLICATED TOPICS! But lately, I have learned a lot about all of them. So if you want to know what I know, just open up this book and start reading.