I have a fast-flipper, too. She's still young, so we only do board books, and I've taken care to choose books with very little text on each page. I also have made up shorter paraphrases, or selectively skip parts to make the books move more quickly. Have you tried activity-type books, like lift-the-flap or touch-and-feel? Do those slow him down at all? Also, what does he do if you give him a book to flip pages on while you read a different book?
9/12/11 at 4:43pm