Man vs Beast is a great book, which is part of the Cherub series, written by Robert Muchamore. Cherubs are kids who are hand picked and trained to be spies, going on missions you would never even dream of, to help the intelligence agencies filter out crimes, and put the biggest criminals behind the bars.
The main characters is Cherub's hero, James Adams, along with his younger sister Lauren. In this book, James, Lauren and Kyle -James' friend- set out on a mission to bring down the AFM (animal freedom militia). The AFM ignore all animal liberation rules and regulations, by performing thousands of lab experiments on animals everyday. Animals are dying everyday, but some say that these experiments provide essential information and scientific knowledge. James, Lauren and Kyle are stuck in the middle.
I really loved this book as animals and the environment have always been my keen interest. Lauren was my favourite character in this particular book, as what she did for the animals is something that not a lot of people do. Personally I don't like many books, but this book in particular is and will always be one of my favourites. This book is the 6th one in the series however, you don't have to read it in order, but it would be better if you did.