Gustav is missing! / Zuill, Andrea

Little Cap lives with his best friend, Gustav, but when Gustav goes missing one day, Little Cap must be brave and set out on a quest to find his missing friend. His confidence is tested when he talks to his neighbors, scales a sheer cliff, and even steps in something really gross, but eventually his bravery pays off when he finds Gustav. They return home but Little Cap is not the same mushroom he was when he left, and he finds himself ready to take on another adventure.

Little Cap, a shy mushroom, sets off into the scary world to find his best friend, slug Gustav.