Some gifted children just find reading too slow and laborious. Sometimes the right material just tunes them in. My son wouldn't read (and still won't) but he wanted to read Nicholas Nickleby! So I bought him this

http://www.amazon.com/Dominoes-Nich...1?ie=UTF8&qid=1239365853&sr=11-1

- it has little comprehension tests at the end of each chapter so you can check his grasp of the story - and he read it. hasn't read much else since, but it just goes to show
(The headwords series are graded so they introduce only a limited vocabulary depending on the series/edition. I think they're great)