Fourth Grade Rats

I am currently reading the book called 'Fourth Grade Rats', the kids in the school made a saying:
                                                       First Grade Babies
                                                       Second Grade Cats
                                                       Third Grade Angels
                                                       Fourth Grade Rats
Suds is the main character in this book still wants to be a third grade angel, but his friend says that being a rat is what he always dreamed about. If you wan't to be a rat, you have to be tough said his friend. But Suds wants to be a third grade angel. In this book Suds is becoming (or going to become) a rat, because his friend is teaching him how to become one.

I think that this book should get 4 stars because it is
 written very good and has very many details.