And something completely different, Konrad Lorenz's study on ethology, in which he breaks down the different societal norms of various species of fish, birds and smaller mammals, all the way up to dogs, wolves and lions, challenging a lot of the myths and preconceptions we might have about these animals.
Good, highly readable and told from a personable POV, it should be required reading (light, not too long or tough) for anyone considering Psychology. We are, in many ways, not so different (and rarely as noble) as the animals we perpetrate to have evolved from.
You can read up on him here: https://en.wikipedia.org/wiki/Konrad_Lorenz