When you read chapters in greater depth consider the reasons for:
the style of narration
the tone of the narrative voice (is it reflective, mournful, ironic, cheerful, etc.)
the author's use of description
the use of hyperbole, if it is used
the imagery (metaphors, similes, personification, motifs, etc.)
the use of mythical imagery and how it is associated with characters
irony in chapter headings and within chapters by the omniscient third person narrator, etc.
How the main omniscient, third person narrator influences and positions the reader on characters through the use of loaded adjectives, comments and asides, etc.
the type of speech associated with characters, sometimes in different contexts: for instance Dr Iannis uses difficult words with some of his patients, such as Stamatis to create awe and to enhance his status on the island. To some degree he is living up to the cliched idea of how a doctor should speak when discussing medical ailments, etc.