Try reading the Jiggy Mccue series by Michael lawrence! They're really funny and there are thirteen books in total. I've read twelve of them so I still need to buy the last one.
Here are the books in order:
The Curse of The Poltergoose (The Poltergoose if you get it second hand)
The Killer Underpants
The Toilet of Doom
The Meanest Genie (Maggot Pie if you get it second hand)
The Snottle
Nudie Dudie
Neville the Devil
Ryan's Brain
The iron, the switch and the broom cupboard
Kid Swap
One for all and all for Lunch
Rudie Dudie (sequel to Nudie Dudie)
Murder and Chips
They may sound and look like they are for 6 year olds, but are actually 9+ and EXTREMELY addicting!