At the Guardian he tagged his top ten underrated or forgotten children's classics, including:
There’s No Such Thing as a Dragon by Jack KentRead about the other entries on the list.
One of my favourites when I was small, and like any personal favourite I simply cannot understand why it’s not everyone else’s favourite, too! It’s the story of a small boy called Billy Bixbee, who wakes up one morning to find a very small dragon in his room – but his mother won’t believe him, saying very sensibly “There’s no such thing as a dragon”. But then, bit by bit, page by page, the dragon starts to grow… This book isn’t all that easy to find nowadays (I’ve given so many as presents I feel I may have bought most of the existing copies myself…) but it’s worth hunting down – it’s so very good. (And though, yes, it’s for relatively young children, there are bits that still make me laugh and I’m 41.)
Also see: The 11 greatest children’s books.