Elliot's Park3 titles in series
Saving Mister Nibbles! Publisher's Summary
From his tree house in a city park, Elliot takes pride in solving problems. But when a squirrel named Mister Nibbles is given to a human as a birthday gift and taken to a house near the park, Elliot isn't sure what to do. Everyone knows squirrels don't belong indoors, but how can Elliot and his friends rescue the trapped rodent?