Kid Normal (and the Rogue Heroes), by Greg James and Chris Smith (paperback)
The Kid Normal series, books 1 - 4 :
Kid Normal 1
Rogue Heroes 2
Shadow Machine 3
The Final Five 4
This is the second funny adventure starring Murph Cooper and the Super Zeroes.... a fast paced, humorous adventure with likeable heroes and a suitably ridiculous evil villain.
Suitable for boys and girls 8-11. Surprising good range of vocabulary in this one!