But, I am slowly starting to get him to read, and to enjoy it.

But now I don't know what to give him next, so I'd like some recommendations from you guys. The book has to be easy to read. I was thinking of Philip Pullman (? the golden compass etc) but am not sure.
So far, he has read and liked the following:
- the hitchhiker's guide to the galaxy
- dragonlance chronicles
- robin hobb's trilogies (assassin, ship of magic)
- big books about AI in computer games