Growing up, monkeys, just based on tv, were animals who loved bananas, looked cute in tutus, and were pets for Michael Jackson. You grow up and find out they have complex social systems- like when a dog kills a baby monkey and they retaliate by taking 250 puppies and drop them from trees as retaliation in the Beed city of Maharashtra state in India. These two books make mention of these behaviors which is why this article caught my attention.