Here is the plot:
The main character, Alexander, has a his crazy grandfather who warns him that aliens are about to take over the world and kill them all. He says that Alexander must assemble an alliance of superheroes to fight the aliens.
Alex runs trials for superheroes at his school. However all he gets are a boy who can throw cards; a boy who runs at people like a Viking, using his tortoise as a weapon; a boy who can burp or fart on demand creating any smell he likes; a secretary and a girl who has the power to be extremely annoying. They go on to fight the aliens, Alexander armed with the amazing maths powers of Einstein's underpants which he wears on his head.
I think this is an absolutely brilliant book for people aged 9 years and over. It has lots of comedy and is very witty. A well deserved 80 out of 100!