The author of this famous book is George Orwell. It was written in 1951. It is a political satire aimed at the Russian Revolution.
Animal Farm is one of the most famous work of fiction ever written. In the book, the animals take over the running of a farm, and everything is wonderful for a while - until the pigs get out of hand. It is a brilliant description of what happens when the revolution goes astray.
Political fiction is hard to do gracefully, but Orwell manages it extremely well. While true appreciation of Animal Farm requires an understanding of the history of the Russian revolution, but those who are not aware of it will still get the point.
And Animal Farm can even be appreciated as a story by children with no understanding of the political message at all! The idea of animals talking itself gives it an inquisitive appeal to be read.