My son got these together with the Spiderman set, for Christmas, and so far has really enjoyed reading these. They encourage reading alone which I find is particularly good for boys. My son, aged 5, has sufficient reading knowledge through school to read alone and he gets a sense of achievement and pride through being able to read and tell us about the books with no pressure to learn new things. Any other books we have that he is capable of reading, tend to be a bit 'babyish' but the stories are relevant to his agegroup and are crucially about characters he wants to discover more about. Great idea and great product.