Join Messy Marcus as he explores some of the most interesting places in the world. In Denali Bus Animal Adventure, Marcus's day begins with nothing to do. Instead of becoming bored, however, Marcus goes to his computer and his imagination for entertainment. He quickly checks the Internet and is off on an exciting adventure at Denali National Park and Preserve. In his adventures, Marcus usually gets into some kind of "mess" and is questioned by his parents about it. Through his explanation, readers learn about the exciting places in the world he has explored. This all comes from his vivid imagination and his creative use of home, yard, and neighborhood.