Personally I get tired of all the 'clever' references in them like 'ter-moo-nators'. Haha, but would YOUR 8 year old have seen Arnie in all his half man/half machine glory? OR recognise a reference to 1066 and King Harold? Do they 'get' word play when they can barely read it straight?
Obviously anything that gets a boy reading is considered 'good' but I think kids get a lot less out of these books than adults think!
There's Horrid Henry but apart from the somewhat dubious moral messages therein, even they contain quite a lot of made up words!
I really don't want to come across as precious and protective but I think there must be more quality age appropriate reading material out there - that the schools can 'push'!