Your Alien by Tammi Sauer
When a little boy meets a stranded alien child, the two instantly strike up a fabulous friendship. They go to school, explore the neighbourhood, and have lots of fun. But at bedtime, the alien suddenly grows very, very sad. Can the boy figure out what his new buddy needs most of all? This funny, heartwarming story proves that friends and family are the most important things in the universe, no matter who or where you are.