No Dogs Allowed

I am not that far in the book, No Dogs Allowed, but my feelings about the book are that I don't really get it. When I saw the book I thought it would be about a puppy that was a stray, a family adopts the puppy, the family is really mean to the puppy, and the puppy escapes and goes through happy and hard times in the wild and, at the end, it finds a nice family. But that was my  imagination.  In reality the book is like a commercial that keeps showing the same commercial over and over again and I just wanted to fall asleep, and I don't even get the commercial.