Thesaurus of humans' souls
The genre of philosophic novel is a peculiar genre of literature. The typical features of this genre strikes imagination with its uniqueness and vividness. Those are novels nit full of action and intrigues, but novels full of feelings and thinking-over. The whole idea of the novel is revealed through feelings and thinking-over of the Main characters.
This is the genre people call as thesaurus of humans' souls. Indeed those are thesauruses of humans' souls. There is no such psychological book that would reveal all the delicate notes of our souls as skillful and bright as the philosophic novels reveal those. Say, you read a novel of Herman Hesse "The Steppenwolf", you will find there thought typical for you and people you know.
Though, I bet you have never thought over those features and their origin but Herman Hesse did. He did and he described all the thoughts he had in his novel. It is common for us to state that there is a beast inside of us and we also think that we are one of a kind for this aspect, though Herman Hesse was more attentive to notice that all of us are of that kind.
People are too chicken to face their cruelty and violence and so they create monsters that are the reasons for all the sins people perform. Though, indeed there are no monsters, there are only people themselves who create those and their deeds. The philosophic novel is a thesaurus of soul of every one of us, the thesaurus that can help us to get our deeds and beliefs.