Martin and his family spend every Sunday together and every Sunday they have the same routine. Not this Sunday, he decides while everyone else watches TV, cooks, and folds laundry.

Instead, Martin invents a world adventure with his dog, Maize, braving extreme cold alongside penguins on ice caps, facing a dragon, confronting pirate ships, and crossing an arid desert on a camel's back. When he returns from his travels happy and exhausted, he recounts his magical journey with Grandma, who marvels at his courage and wonders where he will go next.

Sunday reminds readers young and old about the power of imagination, play, and dreams coming true. In a world where screens are the default, Martin's journey detailed in playful line art with bold colors will encourage kids to make their own discoveries and share their creativity with friends and family.

Perfect for rainy-day reading, this book is also a thoughtful gift for grandparents and little readers who love dogs and new experiences.