This book is about a robot which is with a rat friend and they are like brothers and do everything together.
Sometimes it is fun and not fun because when Ricky wants to do something, the robot always wants to do it, and then comes and spoils it.
There is a character called Uncle Unicorn which is on Uranus and has turned it into a radioactive dump. All the other unicorns on the planet have run away because of what he has done to it but three unicorns stayed and who mutated into huge unicorns and are now serving Uncle Unicorn.
I thought this book, if I could rate it 0-10, I would vote it 10 because it is very cool. You should try and read it one day.