'A dream team of writer and illustrator.' THE TIMES 'Hilarious lessons on human behaviour.' BOOKSELLER "Good morning, class. Today we are going to learn about Earth Family." The latest in the Dr Xargle series! Learn all about Earth Families with Dr Xargle, our friendly alien teacher: brothers are Bothers, sisters are Sulkers, and the number of family members is always larger than the number of chairs at Christmas dinner...