Another fantastic outing for the zany alien!
From the book description:Opal Moonbaby is spending a year on Earth. A whole year! Martha can't wait to take her to school, to introduce her to her friends and to recreate all the fun they had during the summer.
But things don't turn out quite as expected and before Martha knows it, Opal is off making new friends, doing new things and throwing herself into life on Earth - and Martha can't keep up.