STARRED REVIEW! "Messer has arrived at a fine combination here: few words and images, but not too few, and well-chosen to pave the way out of the grumps. The artwork possesses substance and delicacy. Really well turned, with balance, momentum, and all the right notes."—Kirkus Reviews starred review STARRED REVIEW! "This charming account of handling emotions is a great addition to other children's books about grumpy behavior."—School Library Journal starred review Can Penguin find a way to turn his grumpy day into a good night? Have you ever had a grumpy day and not known why? Penguin is having a grumpy day like that. No matter what he does, he just can't shake it! Sometimes the only thing left to do is wash the grumpy day away and start over. The simple text and lively illustrations are the perfect cure for even the grumpiest of days.