''Ghost School is stupid and rubbish, and, um, I''m not going to Ghost School ever again!''

Bumping is Humphrey Bump''s best thing - even better than cakes and lollipops! But the nasty headmaster at ghost school doesn''t agree. He expels Humphrey for - you''ve got it! - bumping.

So the other ghosties - Agatha, Tabitha and Wither -find Humphrey a place at still-alive school. They are also on hand to help him make friends. Wither invisibly writes a spooky poem on the board, Agatha sends children whirling into the clouds, and they all whisp out of Humphrey''s satchel during lessons.

The still-alive children are so mean they only run away. But they are nothing compared to the still-alive headmaster who is the biggest bully ever. Can Humphrey gather all the ghosties together to fight the bully, save the school and make lots of new friends?