I think that the literature review should consist of the specific concepts that are important for understanding the topic of the study, the methodology, and the findings. One you have identified them, there is almost always a logical flow from more general to more specific.
Literature shares with such other linguistic productions as proverbs, maxims, parables, and wise sayings in being taken as a single act, as Aristotle would say, ‘whole and complete’. One implication is that each and every element of that totality is functional – pertaining to the whole of which it is a part: its full identity and meaning may be worked out only by relating it to the whole. If one takes linguistic samples from that totality for independent analysis, that sample should be treated as any linguistic structure constructed as in any language-teaching class strictly for the purpose of analysis. In literature, structures which may not ordinarily pass as acceptable utterances may in fact be the kinds of novelties the Formalists analyse under the concepts of making strange, and making difficult. There is an example here from Charles Dickens’s Dombey and Son: ‘How goes it?’ ‘All well,’ said Mr Gills, pushing the bottle towards him. He took it up, and having surveyed and smelt it, said with extraordinary expression: ‘The,’ returned the Instrument-maker. Upon that he whistled as he filled his glass, and seemed to think they were making holiday indeed.