Bought a bunch of these books for my 4 year old son, who up until now has shown no interest whatsoever in learning to read. It seems the superheroes have captured his imagination and we now have to read one each night at bedtime. Just the right length for a bed time story, and simple words that he is already picking up. He's so excited about finally being able to read a full book to me, so he can get some level 3 books. Have already recommended these to other parents - and these books have also made great birthday presents for nursery friends.