From a review (http://books.guardian.co.uk/review/story/0,,2051699,00.html)
Philip Ardagh
Skulduggery Pleasant
by Derek Landy
368pp, HarperCollins, £12.99
I know I've quoted this before, but, for children not mad keen on the forest of fantasy tales out there, nothing says it better: "I find it difficult to take much interest in a man whose father was a dragon." Thus spoke Dante Gabriel Rossetti to William Morris, apologising for not being gripped by the latter's epic poem Sigurd the Volsung. It can equally be applied to the fantasy epic. But there are many other types of fantasy out there too. The most common of these seem to fall into three main camps: the ironic, knowing, humour-led fantasies (of which Terry Pratchett is the undoubted champion); the Buffy the Vampire Slayer school of fantasy (of the cool, butt-kicking, bring-it-on style); and the likes of Susan Cooper's The Dark is Rising series, where the battle of good and evil is very real and played out on a very human stage with believable contemporary characters.
The kind of children's fantasy which has been less successfully achieved, and is consequently much thinner on the ground, lies somewhere in between. This is the fantasy that doesn't take itself too seriously, but neither does the humour make the dangers an irrelevance. [...]
And, in case you were wondering, Morris did have a response to Rossetti's comment about his hero's father being a dragon. "I don't see it's any odder than having a brother who's an idiot!" he said. See? There's humour everywhere. Though, of course, he may have meant it.