I have just finished reading "The Jungle Book*" to my kids, My wife has just finished Arthur Ransome's "Secret Water"
*surprisingly not wince-inducing, given its era (try getting past the worldview in H Rider Haggard's "King Soloman's Mines", ouch).
The previous book, that the kids enjoyed my reading was Diana Wynne Jones "Power of Three", I was really pleased to find that at a secondhand bookshop, as I clearly remembered that from childhood. I am wondering if they are too young for "Archer's Goon" This was also the cause of one of the best radio Times listings, "Archer's Goon is in the kitchen demanding his £2000, but who is Archer?" Just before the Jeffery Archer libel trial where he was accused of paying a prostitute £2000...
I saw some reviews of the Uncle stories I mentioned in the OP (Has anyone else come across them?)
Many people seem to have missed the subversive streak in J P Martin's descriptions. Fawningly stating that Uncle is wonderful, whilst the behaviour is obviously of a pompous and vain "boaster", whilst one of his allies (Dr Lyre, real name "A. Liar") is a liar, for example.
I think a subversive streak is good in children's literature, the "Agaton Sax" series by Nils Olof Franzen was good for this. And it makes it more fun for the adults to read.
Thanks Gregory for reminding me of The Dark is Rising, one of the first fantasy series that I read.