This Is My Rock — David Lucas

This is my rock! proclaims a young goat. "It's not yours," he bleats at Eagle. "Or yours," he grumbles at Bear. "Nor yours!" he shouts at the other goats. But standing atop a mountain all day and night can be lonely, especially when you have no one else to play with.
With simple wit and beautifully detailed illustrations, David Lucas weaves a tale about sharing and friendship.