for Never Say Boo! by Robin Pulver and Deb Lucke
It isn't easy being the only ghost at Booniesville Elementary School. Poor Gordon looks a fright, and no one is brave enough to befriend him. Luckily, when his school has to be evacuated quickly, the young ghost rises to the occasion without worrying about what people will think; and teachers and students alike discover one should never judge a booo-k by its cover.
Publisher description retrieved from Google Books.