Eleven-year-old Charlie Dembinski knows how to make his group project for science class an organized and informative success. Unfortunately for Charlie, his (reluctant) best friend, Amy Ma, would rather it be interesting, fun and just a bit gross. And their other partner, Jenna Yee, is too worried about why her puppy, Diesel, keeps attacking her mom to think about their project. Luckily for Jenna, Charlie’s mom is a veterinarian, and Amy and Charlie are keen to help figure out what Diesel’s problem is. What the three classmates don’t realize is that Diesel isn’t trying to hurt anyone. Just the opposite in fact: Diesel is trying to save someone! But will the kids figure out what he’s trying to tell them before Diesel's behavior becomes too much to handle? The second in the Charlie's Rules series, following Pasture Bedtime, from bestselling author Sigmund Brouwer, Ruff Day is sure to delight young animal lovers. The straightforward plot, black-and-white illustrations and unique animal stories make this the perfect chapter book for early readers.