Complex sentence: He frames the novel as a true account of true heroes, complete with references to historical texts, but he is often cited as an unreliable narrator because of his peculiar fixations on seemingly trivial aspects of the story.
Split into simpler sentences: He frames the novel as a true account of true heroes, complete with references to historical texts. He is often cited as an unreliable narrator, because of his peculiar fixations on seemingly trivial aspects of the story.