Literature search is a key step in learning about a research topic. This unit gives you a strategic, rigorous approach to engaging the scientific literature. We begin with identifying what you need to learn and how to organize scientific knowledge, then move to recognizing and probing gaps through a variety of approaches, and using targeted literature searching to be both thorough and precise in finding what you need. Later lessons cover how to iterate on your literature search and document a search to keep it rigorous, as well as how to engage cautiously with an LLM as an additional tool. This unit can help researchers at all career stages to improve efficiency and accuracy in work with published research.