1. Build a search strategy
Choose the right databases and turn your question into keywords and Boolean searches you can reproduce.
How to write a literature review
A literature review isn’t a summary of everything you read — it’s an argument about the state of a field that earns your study its place in it. Done well, it shows you know the conversation, where it’s stuck, and exactly where your work fits. This guide breaks it into five doable steps.
The five steps
Most reviews go wrong by collapsing these into “read a lot, then describe each paper.” Keep them separate:
2. Synthesize, don’t summarize
Use a synthesis matrix to find patterns across sources — agreement, tension, gaps — not a paper-by-paper list.
3. Know your review type
Narrative, scoping, or systematic — each has different rules, and a systematic review needs a PRISMA flow.
Free tool: PRISMA Generator
4. Find the gap
Turn “what’s missing” into a defensible gap that justifies your research question.
Free tool: Research Question Validator
5. Structure it by theme
Organise by argument and theme — never author-by-author — and reference it cleanly.
Free tool: Citation Formatter
More literature-review guides
The specific questions that come up once you’re deep in the reading:
How to write an annotated bibliography
The two annotation types, what each should contain, a worked example, and how it differs from a reference list.
Free tool: Citation Formatter
How to critically evaluate a research article
A practical appraisal checklist — design fit, sample, measures, analysis, claims vs results, bias — for quantitative and qualitative papers.
Free tool: Lit-Review Readiness Check
Literature review vs systematic review
How they differ in purpose, method, reproducibility, and effort — and when to use each.
Free tool: PRISMA Flow Diagram Generator
How many sources should it have?
Why it depends, rough ranges by degree, the concept of saturation, and why quality and recency beat a raw count.
Free tool: Citation Gap Finder
The one shift that upgrades most reviews
Stop writing “Author A found X; Author B found Y” and start writing “On X, the field splits — some find… while others… which leaves Z unresolved.” That move — from summary to synthesis — is what separates a descriptive review from one that makes an argument. Everything in this guide builds toward it.
Use the tools as you go
- Lit Review Synthesizer & the Readiness Check — is your review ready to write?
- PRISMA Flow Diagram Generator — for systematic reviews.
- Citation & Reference Formatter (APA 7 / Vancouver).
- Research Question Validator — sharpen the question your gap justifies.
Get the free Literature Review toolkit
A search-log template, a synthesis matrix, and a structure outline from Literature Review Simplified. We’ll email you the download link.
Frequently asked questions
What is a literature review?
A critical, organised account of what is known about your topic — synthesising across sources to show where the field agrees, disagrees, and leaves gaps, and where your study fits.
How long should it be?
It depends on the type and level — a thesis chapter is far longer than a journal-article section. Coverage and synthesis matter more than length or source count.
What’s the biggest mistake?
Summarising source by source instead of synthesising by theme. Organise by argument, not author.