OMG was so going to say that!the very hungry caterpillar
horton hears a who
green eggs and ham
This. Or Macbeth.
Its strange that you mention the Iliad. Thats exactly what my girlfriend did with her seven year old nephew. He hates reading, but she pulled out the Odyssey and the kid got hooked. It helped that the book had a lot of pictures but he was just crazy about all the Greek monsters with odysseus in the odyssey. I guess any good story could captivate the little mate like that. But Greek myths do a pretty good job.Try the Iliad.
Great reccommendation.Why not try Mark Haddon's The Curious Incident of the Dog in the Night Time?