I don't entirely agree. While history books do include a lot of facts, these facts can be selected according to the bias of the author. It's possible to argue that even the most diligent author who tries to be wholly objective cannot avoid the biasing influences of her own cultural background.
Recently, there was a huge row between China and Japan over Japanese school textbooks, in which the massacre of thousands at Nanjing was described as an 'incident'. That is undoubtedly true - but is it 'the truth'?
Moreover, while history books contain facts, they mainly contain argument supported by evidence. Different historical interpretations are possible of the same events using the same facts. That's why history is an art, not a science.
Azarkon, it's very interesting to read through your ideas. It looks like you're advocating an epistemological position that it's not possible to know the absolute truth of something, only to get some degree of understanding it by looking at it from several directions, all of which only give part of the whole picture. You might be taking a representationalist or idealist view, I'm not certain - or something else quite different (I struggle to understand all of this ). These are serious and widely-held views of the world, among philosophers and academics. Not everyone believes that the empirical approaches of the natural sciences work well when applied to understanding human behaviour.