Inkspellme "Don't think little women is going to cut it somehow" (Don't you wish!
"
But you could try Tom Sawyer, Coral Island (better IMO than Treasure Island - try both), 20,000 Leagues Under the Sea (utterly bewitched ds at that age), the Willard Price animal adventure books (like 20,000L, dreadfully dated but thoroughly fun), Sherlock Holmes, The 3 Musketeers (as with 20,000L, check that it's a decent translation first - abridged is fine, but not overly simplified, you still want the rich language).
If he likes fantasy, the Earthsea trilogy is good, also The Hobbit, and Terry Pratchet's non-Discworld novels.
Try nonsense poetry - Spike Milligan of course!
It's such a pleasure reading something to your child that you yourself actually enjoy.