Universities increasingly expect students to publish during a PhD candidature because it benefits the candidate, supervisor, institution and wider community. Here we describe a method successfully used by early career researchers including PhD candidates to undertake and publish literature reviews - a challenge for researchers new to a field. Our method allows researchers new to a field to systematically analyse existing academic literature to produce a structured quantitative summary of the field. This method is a more straightforward and systematic approach than the traditional 'narrative method' common to many student theses. When published, this type of review can also complement existing narrative reviews produced by experts in a field by quantitatively assessing the literature, including identifying research gaps. The method can also be used as the initial step for further analysis, including identifying suitable datasets for meta-analysis. Students report that the method is enabling and rewarding.