Book excerpt: 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.