Originally published in 1979, this is one of those books that sat in our library until we had children old enough to enjoy it. Our son thought it was ok but our daughter really loved it. So much so that when I forgot to pack it to read on the bus to school one day I had a problem. Fortunately, the Kindle version of the book is very well done with the pages set side by side so that I can read them to my daughter and she can look at the pictures while I am reading. The illustrations are large enough (and my daughter knew the story well enough) that she can still find the 'I Spy' portion of the book while on my phone. With my older eyes, I prefer the tablet but both versions are still quite good.