This was my favouorite book as a child. I must have read it at least 50 times, and it isn't a short book.
For any child that ever wanted to own their own puppy - this is the book. Shadow is an immensely loveable dog with a great personality that will win you over without fail.
Some of the other dogs on the farm are so memorable that even though it has been over 15 years since I last read this I can still remember them. Grumpy Bob, Rafe - they are all there. Blyton really does capture each character so clearly that you are never in any doubt as to what their characters are like.
And as with all Blyton tales, there is a fantastic sense of adventure to every chapter.